QCVN 134:2024/BTTTT on Specific Absorption Rate (SAR) for Handheld and Body-Worn Radio Equipment

QCVN 134:2024/BTTTT is the National Technical Regulation on specific absorption rate for handheld and body-worn radio equipment, issued by the Ministry of Information and Communications (now the Ministry of Science and Technology) along with Circular 19/2024/TT-BTTTT on December 31, 2024. This regulation sets limit levels for the absorption of radio waves from handheld and body-worn devices such as mobile phones, laptops, tablets…

Accordingly, organizations and individuals manufacturing, importing, and trading equipment regulated in QCVN 134:2024/BTTTT are responsible for implementing regulations on conformity certification and declaration of conformity for equipment within the scope of this Regulation.

See more: Capacity Profile Of Phuc Gia Laboratory Corporation

1. What is the Specific Absorption Rate (for electromagnetic waves)?

Specific Absorption Rate, or SAR, is an index that measures the rate at which energy is absorbed by the head, body, or limbs of a mobile device user when they are exposed to a radio frequency electromagnetic field.

The concept of Specific Absorption Rate (SAR) has been mentioned for many years, associated with concerns about radio frequency (RF) safety. Simply understood, RF energy is a form of electromagnetic wave used in many broadcasting devices such as mobile phones, headsets, smartwatches, etc. When the human body is exposed to high-intensity RF waves, this energy can be absorbed into tissues and cause heating—similar to how a microwave oven heats food. This has raised concerns about the effects of RF waves on human health.

2. Why is it necessary to issue QCVN 134:2024/BTTTT?

Studies from the World Health Organization (WHO) and the International Agency for Research on Cancer (IARC) both note that during the use of broadcasting devices such as mobile phones, wireless headsets, or Wi-Fi devices, the human body can absorb a portion of radio frequency (RF) electromagnetic energy. If this absorption level is too high, body tissues can heat up, affecting physiological activities, especially in the head area (potentially impacting electroencephalographic activity, cognitive function, sleep, heart rate, and blood pressure, etc.) – where direct contact with the device often occurs.

On that basis, many standardization organizations such as the IEC and IEEE have developed methods for measuring and evaluating the Specific Absorption Rate (SAR), helping to determine the level of electromagnetic energy that the human body absorbs when using wireless devices. Currently, countries such as the USA, Japan, Australia, many APAC nations, the Schengen area, etc., have all issued technical standards on the specific absorption rate (SAR certification).

Recognizing the risks of continuous exposure to radio frequencies to health as well as ensuring harmony with international standards, the Ministry of Information and Communications (now the Ministry of Science and Technology) issued QCVN 134:2024/BTTTT – the National Technical Regulation on specific absorption rate for handheld and body-worn radio equipment, which was promulgated on December 31, 2024.

3. General overview of QCVN 134:2024/BTTTT

QCVN 134:2024/BTTTT specifies limits and measurement methods for the specific absorption rate for radio equipment with an equivalent isotropically radiated power (EIRP) greater than 20 mW, including: Mobile phones, DECT phones (only handheld units are regulated), tablets, and laptops. These devices must be designed for use at a distance of less than 200 mm from humans.

The limits and measurement methods for specific absorption rate for radio equipment certification in QCVN 134:2024/BTTTT have been adjusted to align with ICNIRP guidelines and the majority of countries, specifically as follows:

• SAR limit for head and torso: 2 W/kg (averaged over 10g);
• SAR limit for limbs: 4 W/kg;
• Whole-body SAR limits are not applied;
• Measurement frequency range: 30 MHz to 6 GHz;
• Measurement distance: The distance between the Equipment Under Test (EUT) and the Flat Phantom is 5 mm when evaluating SAR for the torso, and the distance between the EUT and the Flat Phantom is 0 mm when evaluating SAR for the limbs.

Conformity certification and declaration for equipment according to conformity assessment Method 1, Method 5, and Method 7 are regulated in Circular No. 28/2012/TT-BKHCN and its amendments, supplements, or replacements.

• Terrestrial mobile phones must be mandatorily performed a declaration of conformity based on the certification results from a certification body designated by the Ministry of Information and Communications to test QCVN 134:2024/BTTTT.
• DECT cordless phones, laptops, and tablets must perform a declaration of conformity based on the self-assessment results of organizations or individuals on the basis of testing results according to QCVN 134:2024/BTTTT.

Circular No. 19/2024/TT-BTTTT takes effect from February 15, 2025, with a specific roadmap for applying QCVN 134:2024/BTTTT as follows:

• From February 15, 2025, QCVN 134:2024/BTTTT is applied voluntarily for testing, conformity certification, and declaration of conformity.
• From July 1, 2026, terrestrial mobile phones must comply (mandatory application) with QCVN 134:2024/BTTTT before being circulated on the market.
• From July 1, 2027, products and goods within the scope of QCVN 134:2024/BTTTT (DECT cordless phones – only applicable to handheld units, Laptops, Tablets) must comply (mandatory application) with this regulation before being circulated on the market.

Below is the content of QCVN 134:2024/BTTTT regarding the specific absorption rate for handheld and body-worn radio equipment; we hope that relevant individuals and organizations will follow and comply with the provisions of this regulation.

4. Full text of QCVN 134:2024/BTTTT

Foreword

QCVN 134:2024/BTTTT was compiled by the Authority of Radio Frequency, submitted by the Department of Science and Technology, appraised by the Ministry of Science and Technology, and issued by the Minister of Information and Communications along with Circular No. 19/2024/TT-BTTTT dated December 31, 2024.

QCVN 134:2024/BTTTT

NATIONAL TECHNICAL REGULATION ON SPECIFIC ABSORPTION RATES FOR HAND-HELD AND BODY-WORN WIRELESS COMMUNICATION DEVICES

1. GENERAL PROVISIONS

1.1. Scope of Adjustments

QCVN 134:2024/BTTTT specifies the limits and measurement methods of the Specific Absorption Rate (SAR) for radio equipment with an equivalent isotropically radiated power (EIRP) greater than 20 mW and designed by the manufacturer to be used at a distance of less than 200 mm from the human body.

Appendix E (of QCVN 134:2024/BTTTT)

HS Codes for handheld and body-worn radio equipment

ORD	Product Names	HS Code	Product Description
01	Terrestrial Mobile Phone	8517.13.00 8517.14.00	Terrestrial mobile phones using E-UTRA (4G) technology and may integrate one or more of the following functions: – W-CDMA FDD (3G) mobile communication terminals; – Fifth generation (5G) mobile communication terminals; – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Short-range radio transmitters/transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.
		8517.13.00 8517.14.00	Terrestrial mobile phones using fifth-generation (5G) mobile communication technology with or without integrating one or more of the following functions: – Terrestrial mobile communication terminals; – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Short-range radio transmitters/transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.
02	DECT Wireless Subscriber Extension Telephone Equipment (only applicable to handsets)	8517.11.00	A wireline telephone set includes a base station (Base Station) accompanied by one or several cordless extension handsets (handsets) using DECT technology. The portable handheld devices (handsets) connect to the fixed network through the base station (Base Station), which is a fixed telephone that connects calls to the landline network.
03	Laptop	8471.30.20	Laptops integrating one or more of the following functions: – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Terrestrial mobile communication terminals; – Fifth generation (5G) mobile communication terminals; – Short-range radio transmitters/transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.
04	Tablet	8471.30.90	Tablets comprising at least a central data processing unit, a keyboard, and a display (excluding laptops, notebooks, and subnotebooks), incorporating one or more of the following functions: – Terrestrial mobile communication terminals; – Fifth generation (5G) mobile communication terminals; – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Short-range radio transmitters/transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.

QCVN 134:2024/BTTTT This regulation does not apply to implanted medical devices.

1.2. Subjects of application of QCVN 134:2024/BTTTT

This technical QCVN 134:2024/BTTTT applies to Vietnamese and foreign agencies, organizations, and individuals involved in manufacturing, importing, trading, and operating equipment within the scope of this Technical Regulation in the territory of Vietnam.

1.3. Normative references

IEC 62209-1528:2020 Measurement procedure for the assessment of specific absorption rate of human exposure to radio frequency fields from hand-held and body-worn wireless communication devices – Human models, instrumentation and procedures (Frequency range of 4 MHz to 10 GHz).

ICNIRP Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz).

1.4. Definitions

1.4.1. Accessory

An optional component or attachment that can be used with the Device Under Test (DUT).

Notes:

• Accessories used to hold, mount, carry, wear, or attach the device, as well as serve any other specific purpose on the user’s body (such as: belt clips, wristbands, or any type of body straps or neck straps).
• Electronic accessories to perform specialized tasks or provide additional features (e.g., GPS modules, peripheral printers, MP3 players, cameras, observation devices).
• Electronic accessories providing audio or video input or output (e.g., headsets, microphones, cameras).
• Accessories providing enhanced RF signal strength for the device (e.g., primary antennas, replacement antennas, or auxiliary antennas).
• Batteries and related DC power components.
• A combination of accessories, where two or more of the above accessories are combined into a single unit.

1.4.2. Basic Restriction

Exposure limits for humans regarding compliance with time-varying electric, magnetic, and electromagnetic fields measured inside the body are determined based on adverse health effects.

Note: Within the scope of this document, the physical quantity used as a basic restriction is the specific absorption rate (SAR).

1.4.3. Body-worn Device

A device containing one or more wireless transmitters or transceivers placed near a person’s body or limbs (excluding the head) using a carrying accessory to support activities according to its intended use.

Note: This document uses the term “body-worn” synonymously with the term “body-mounted” used in previous versions.

1.4.4. Channel

RF Channel

A transmission frequency range specifically divided according to the operating parameters of an individual wireless technology.

Note: The number of RF channels and their corresponding channel bandwidths may vary between different wireless technologies.

In this document, SAR measurements are performed at specified channels; for example: the high-frequency channel, mid-frequency channel, and low-frequency channel of the transmission band.

1.4.5. Conservative Exposure

An estimated value of psSAR (peak spatial-average SAR), including the measurement uncertainty specified in this document, representing a result higher than the expected value obtained in the head or body of the majority of users during the intended use of a wireless device.

1.4.6. Device Under Test

DUT

A device containing one or more wireless transmitters or transceivers that is tested according to the methods of this document.

Note: The device under test can be further classified as a body-worn device, body-supported device, desktop device, front-of-face device, hand-held device, hand-worn device, clothing-integrated device, or general device.

1.4.7. Fast SAR Testing

The use of special techniques, methods, or algorithms to reduce SAR measurement time compared to full SAR testing.

Note:

• Type 1 Fast SAR testing uses hardware that complies with all requirements of this document for full SAR testing. However, it employs testing methods that are faster than following full SAR testing procedures.
• Type 2 Fast SAR testing uses hardware and testing procedures that do not comply with the requirements of this document for full SAR testing.

1.4.8. Full SAR testing

The use of specific methods, procedures, and hardware that fully comply with all requirements specified in this document, except for those requirements specified in 3.9.2.

1.4.9. Head-mounted device

A device containing one or more wireless transmitters or transceivers placed near a person’s head or neck using an accessory to support the device’s operation according to its intended use.

Note: This definition does not include handheld devices.

1.4.10. Intended Use

The conditions of use for which a product is designed, fully compliant with all available functions, according to the specifications, instructions, and information provided by the manufacturer in the user manual.

1.4.11. Limb-worn Device

A device containing one or more wireless transmitters or transceivers, intended to be worn on the user’s limbs (arms or legs) while transmitting.

Note: Types of limb-worn devices include those worn on the wrist, ankle, and forearm. Some jurisdictions specify different requirements for limb-worn devices placed away from the wrist or ankle.

1.4.12. Measurement Uncertainty

1.4.12.1. Uncertainty Evaluation

<Type A> evaluation of uncertainty by the statistical analysis of a series of observations (measurements).

<Type B> evaluation of uncertainty by means other than the statistical analysis of a series of observations (measurements).

1.4.12.2. Standard Uncertainty

The estimated standard deviation of a measurement result, obtained by taking the positive square root of the estimated variance.

1.4.12.3. Combined Uncertainty

The estimated standard deviation of the measurement result obtained by combining the standard measurement uncertainties of both Type A and Type B evaluations using the conventional “root sum of squares” method to combine the obtained standard deviations by taking the positive square root of the estimated variances.

1.4.12.4. Expanded Uncertainty

The quantity defining an interval about the measurement result that can be expected to encompass a large fraction of the distribution of values that could reasonably be attributed to the measurand.

1.4.13. Primary Peak SAR Value

The largest interpolated SAR value identified within an area scan measurement.

1.4.14. Secondary Peak SAR Value

In an area scan measurement, the interpolated maximum SAR value that is smaller than the primary peak SAR value.

1.4.15. Peak Spatial-average SAR

psSAR

The peak SAR value averaged over an internal region based on a specified average mass. For example: any 1g or 10g of a cube-shaped sequence.

Note: In this document, the terms psSAR (over 1g or 10g) and the terms 1g SAR and 10g SAR are used interchangeably.

1.4.16. Phantom

A physical model equivalent to the human body, consisting of tissue-simulating material with dielectric properties specified in this document.

Note: SAR in a tissue-equivalent medium can be determined by the rate of temperature rise or by E-field measurement, according to the following formulas:

1.4.18. Test Configuration

The set of applicable DUT parameters for SAR measurement, including the position of the DUT on the phantom, the DUT usage configuration (e.g., antenna position), and the operating mode.

1.4.19. Time-period Averaged SAR

TPAS

The SAR averaged over a specified average time interval when a power control algorithm is applied.

1.4.20. Time-averaged SAR

The SAR measured over an integration time long enough to ensure stable results across the duty factor and other characteristics of the modulated signal.

1.4.21. Generic Device

A device that is not classified into any specific device category.

1.4.22. Hand-held Device

A device operated in the user’s hand at a distance of more than 200 mm from the head or body during its intended use.

1.4.23. Handset

A wireless communication device designed to be held in the hand and operated next to the ear, including an audio output or earphone and an audio input or microphone, and containing a radio transmitter and receiver.

1.5. Symbols and Abbreviated Terms

Symbols and abbreviated terms in QCVN 134:2024/BTTTT are specified as follows:

Note: In this document, temperature is specified in degrees Celsius, calculated by: T (°C) = T(K) – 273,15 K.

ε₀ – Permittivity of free space (8,854 × 10⁻¹² F/m)

µ_o – Permeability of free space (4π × 10⁻⁷ H/m)

DUT: Device Under Test

E-field: Electric Field Strength

H-field: Magnetic Field Strength

ICES: International Committee on Electromagnetic Safety

ICNIRP: International Commission on Non-Ionizing Radiation Protection

psSAR: Peak Spatial-Average SAR

RF: Radio Frequency

SAR: Specific Absorption Rate

2. TECHNICAL REGULATIONS

Limits for Specific Absorption Rate (SAR) according to QCVN 134:2024/BTTTT are specified in the table below:

Frequency	Limits
	Head and Body	Limbs
30 MHz to 6 GHz	2 W/kg on 10g of tissue	4 W/kg on 10g of tissue

3. MEASUREMENT METHODS

Methods for measuring the Specific Absorption Rate (SAR) in QCVN 134:2024/BTTTT must comply with the requirements of IEC 62209.

3.1. General

Comply with requirement 7.1 of IEC 62209-1528:2020.

3.2. Test Preparation

3.2.1. Tissue-equivalent Medium and System

Comply with requirement 7.2.1 of IEC 62209-1528:2020.

3.2.2. Wireless Connections to the Test Sample

Comply with requirement 7.2.2 of IEC 62209-1528:2020.

3.2.3. Operating Modes of the Test Sample

Comply with requirement 7.2.3 of IEC 62209-1528:2020.

3.2.4. Position of the Test Sample

Comply with requirement 7.2.4 of IEC 62209-1528:2020, except for section 7.2.4.1.2.

The replacement regulation for section 7.2.4.1.2 is as follows: The distance between the Device Under Test (DUT) and the Flat Phantom is ≤ 5 mm when evaluating SAR for the trunk, and the distance between the Equipment Under Test (EUT) and the Flat Phantom is 0 mm when evaluating SAR for the limbs.

3.2.5. Antenna Configurations

Comply with requirement 7.2.5 of IEC 62209-1528:2020.

3.2.6. Options and Accessories

Comply with requirement 7.2.6 of IEC 62209-1528:2020.

3.2.7. Test Samples and Factors

Comply with requirement 7.2.7 of IEC 62209-1528:2020.

3.2.8. Operating Frequencies of the Test Sample

Comply with requirement 7.2.8 of IEC 62209-1528:2020.

3.3. Tests to be Conducted

3.3.1. General

Comply with requirement 7.3.1 of IEC 62209-1528:2020.

3.3.2. Basic Test Procedures

Comply with requirement 7.3.2 of IEC 62209-1528:2020.

3.4. Test Procedure

3.4.1. General

Comply with requirement 7.4.1 of IEC 62209-1528:2020.

3.4.2. Full SAR Test Procedure

Comply with requirement 7.4.2 of IEC 62209-1528:2020.

3.4.3. Scan Tests

Comply with requirement 7.4.3 of IEC 62209-1528:2020.

3.4.4. Testing When the Test Sample as Multiple Antennas or Multiple Transmitters

Comply with requirement 7.4.4 of IEC 62209-1528:2020.

3.5. Data Processing

3.5.1. Interpolation

Comply with requirement 7.5.1 of IEC 62209-1528:2020.

3.5.2. Extrapolation

Comply with requirement 7.5.2 of IEC 62209-1528:2020.

3.5.3. Determination of the Averaging Mass

Comply with requirement 7.5.3 of IEC 62209-1528:2020.

3.5.4. Determination of the Maximum Value

Comply with requirement 7.5.4 of IEC 62209-1528:2020.

3.6. Time-period Averaged SAR

3.6.1. General

Comply with requirement 7.6.1 of IEC 62209-1528:2020.

3.6.2. Conducted Power

Comply with requirement 7.6.2 of IEC 62209-1528:2020.

3.6.3. Test Configurations

Comply with requirement 7.6.3 of IEC 62209-1528:2020.

3.6.4. Absorption Conditions and Test Positions

Comply with requirement 7.6.4 of IEC 62209-1528:2020.

3.6.5. Time-period Averaged SAR with Simultaneous Transmission

Comply with requirement 7.6.5 of IEC 62209-1528:2020.

3.6.6. Evaluation of Exposure Factor

Comply with requirement 7.6.6 of IEC 62209-1528:2020.

3.6.7. SAR Testing

Comply with requirement 7.6.7 of IEC 62209-1528:2020.

3.6.8. Measurement Uncertainty for Time-period Averaged SAR Testing

Comply with requirement 7.6.8 of IEC 62209-1528:2020.

3.7. Testing for Use with Sensors

3.7.1. General

Comply with requirement 7.7.1 of IEC 62209-1528:2020.

3.7.2. Determination of Sensor Triggering Distance

Comply with requirement 7.7.2 of IEC 62209-1528:2020.

3.7.3. Determination of Sensor Coverage Area

Comply with requirement 7.7.3 of IEC 62209-1528:2020.

3.7.4. SAR Testing Using Sensors

Comply with requirement 7.7.4 of IEC 62209-1528:2020.

3.8. SAR Correction

3.8.1. General

Comply with requirement 7.8.1 of IEC 62209-1528:2020.

3.8.2. SAR Correction Formula

Comply with requirement 7.8.2 of IEC 62209-1528:2020.

3.8.3. Uncertainty of the Correction Formula

Comply with requirement 7.8.3 of IEC 62209-1528:2020.

3.9. Methods to Shorten Test Time

3.9.1. General

Apply one of the two test methods to shorten test time.

Comply with requirement 7.9.1 of IEC 62209-1528:2020.

3.9.2 Fast SAR Testing

Comply with requirement 7.9.2 of IEC 62209-1528:2020.

3.9.3 Reduced SAR Testing

Comply with requirement 7.9.3 of IEC 62209-1528:2020.

4. MANAGEMENT REGULATIONS

4.1. Related radio equipment within the scope of regulation specified in section 1.1 must comply with the technical regulations in QCVN 134:2024/BTTTT.

4.2. Conformity certification and declaration for equipment within the scope of QCVN 134:2024/BTTTT shall be carried out according to the conformity assessment methods in 4.6 and current regulations.

4.3. Measuring and testing facilities and equipment used for conformity assessment: Comply with the laws on measurement and the laws on the quality of products and goods.

4.4. Terrestrial mobile phones (see Annex E) must undergo mandatory conformity declaration based on certification results from certification bodies designated by the Ministry of Information and Communications.

4.5. DECT cordless telephone equipment, laptops, and tablets (see Annex E) must undergo conformity declaration based on the self-assessment results of organizations or individuals on the basis of testing results.

4.6. Conformity assessment methods

4.6.1. Conformity certification is carried out according to the following methods: Method 1, Method 5, and Method 7 as specified in Circular No. 28/2012/TT-BKHCN and its amendments, supplements, or replacements.

– Method 1: Typical sample testing.

Applied to grant Conformity Certificates for products and goods manufactured on a production line that already has a quality management system certification (ISO 9001 or equivalent).

– Method 5: Typical sample testing and evaluation of the production process; supervision through testing samples taken at the production site or on the market combined with evaluation of the production process.

Applied to grant Conformity Certificates for products and goods manufactured on a production line that does not yet have a quality management system certification (ISO 9001 or equivalent) but has a production and monitoring process that ensures quality for evaluation.

– Method 7: Testing and evaluation of product and goods lots.

Applied to grant Conformity Certificates for products and goods that cannot be applied under Method 1 or Method 5.

4.6.2. The conformity assessment method must be specifically recorded on the certificate of conformity to technical regulations.

5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

Relevant organizations and individuals are responsible for implementing the regulations on conformity certification and conformity declaration for equipment within the scope of QCVN 134:2024/BTTTT and are subject to inspection by state management agencies in accordance with current regulations.

6. ORGANIZATION OF IMPLEMENTATION

6.1. The Authority of Telecommunications, the Authority of Radio Frequency Management, and the Departments of Information and Communications are responsible for organizing and guiding the implementation of management for radio equipment according to QCVN 134:2024/BTTTT.

6.2. In the event that the regulations mentioned in this Regulation are amended, supplemented, or replaced, the regulations in the new document shall apply.

6.3. During the implementation of QCVN 134:2024/BTTTT, if any issues or difficulties arise, relevant organizations and individuals shall report them in writing to the Ministry of Information and Communications (Department of Science and Technology) for guidance and resolution./.

Annex A (Normative) Requirements for Test Equipment

QCVN 134:2024/BTTTT stipulates that test equipment must comply with the requirements of IEC 62209-1528:2020.

A.1. General Requirements

Comply with requirement 6.1 of IEC 62209-1528:2020.

A.2. Phantom Specifications

Comply with requirement 6.2 of IEC 62209-1528:2020.

A.3. Hand Effect on SAR in the Head

Comply with requirement 6.3 of IEC 62209-1528:2020.

A.4. Requirements for Scanning Systems

Comply with requirement 6.4 of IEC 62209-1528:2020.

A.5. Device Holder Specifications

Comply with requirement 6.5 of IEC 62209-1528:2020.

A.6. Specifications for the Data Acquisition System

Comply with requirement 6.6 of IEC 62209-1528:2020.

Annex B (Informative) Requirements for Test Reports

QCVN 134:2024/BTTTT stipulates that test reports must comply with the requirements of IEC 62209-1528:2020.

B.1. General Requirements

Comply with requirement 9.1 of IEC 62209-1528:2020.

B.2. Contents Required in the Test Report According to QCVN 134:2024/BTTTT

Comply with requirement 9.2 of IEC 62209-1528:2020.

Annex C (Informative) Measurement Uncertainty

QCVN 134:2024/BTTTT stipulates that requirements related to measurement uncertainty evaluation must comply with IEC 62209-1528:2020.

C.1. General

Comply with requirement 8.1 of IEC 62209-1528:2020.

C.2. Requirements for Uncertainty Evaluation

Comply with requirement 8.2 of IEC 62209-1528:2020.

C.3. Uncertainty Evaluation Models

Comply with requirement 8.3 of IEC 62209-1528:2020.

C.4. Factors Influencing Measurement Uncertainty

Comply with requirement 8.4 of IEC 62209-1528:2020.

Annex D (Informative) Evaluation and Testing Flowchart

QCVN 134:2024/BTTTT stipulates that the content of the evaluation and testing flowchart must comply with requirement 5 of IEC 62209-1528:2020.

Annex E (Normative) HS codes for Handheld and Body-worn Radio Equipment

QCVN 134:2024/BTTTT applies to radio equipment with power greater than 20 mW and used at a distance of less than 200 mm from humans. The HS codes for the products are specified as follows:

ORD	Product Name	HS Code	Product Description
01	Terrestial Mobile Phone	8517.13.00 8517.14.00	Terrestrial mobile phones using E-UTRA (4G) technology and may integrate one or more of the following functions: – W-CDMA FDD (3G) mobile communication terminals; – Fifth-generation (5G) mobile communication terminals; – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Short-range radio transmitters or transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.
		8517.13.00 8517.14.00	Terrestrial mobile phones using fifth-generation (5G) mobile communication technology, with or without integrating one or more of the following functions: – Terrestrial mobile communication terminals; – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Short-range radio transmitters or transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.
02	DECT Wireless Subscriber Extension Telephone Equipment (only applicable to handsets)	8517.11.00	Wired telephone sets consisting of a base station (Base Station) accompanied by one or several cordless handsets using DECT technology. The portable mobile units (handsets) connect to the fixed network via the base station (Base Station), which is a fixed telephone unit that connects calls to the fixed network.
03	Laptop	8471.30.20	Laptops integrating one or more of the following functions: – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Terrestrial mobile communication terminals; – Fifth-generation (5G) mobile communication terminals; – Short-range radio transmitters or transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.
04	Tablet	8471.30.90	Tablets comprising at least a central processing unit, a keyboard, and a display (excluding laptops, notebooks, and subnotebooks), integrating one or more of the following functions: – Terrestrial mobile communication terminals; – Fifth-generation (5G) mobile communication terminals; – Broadband data transmission operating in the 2.4 GHz band; – 5 GHz band radio access; – Short-range radio transmitters or transceivers with an equivalent isotropically radiated power (EIRP) greater than 20 mW.

Reference Documents

[1] IEC 62209-1528:2020 Measurement procedure for the assessment of specific absorption rate of human exposure to radio frequency fields from hand-held and body-worn wireless communication devices – Human models, instrumentation and procedures (Frequency range of 4 MHz to 10 GHz).

[2] ICNIRP Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz), 2020.

View and download the whole document on QCVN 134:2024/BTTTT 

Please wait a moment to load the Circular No. 19/2024/TT-BTTTT – QCVN 134:2024/BTTTT “National Technical Regulation on specific absorption rate for handheld and body-worn radio equipment”

Click here to download the Circular No. 19/2024/TT-BTTTT – QCVN 134:2024/BTTTT (PDF)

Click here to download the Circular No. 19/2024/TT-BTTTT – QCVN 134:2024/BTTTT (Word)