Wireless Microphone NBTC Certification

Wireless microphones sold in Thailand require NBTC certification under the Wireless Microphone application. Certification class depends on the operating frequency band: microphones in the 165–210 MHz range qualify for SDoC (Supplier's Declaration of Conformity), while those operating in the 694–806 MHz range require Class A (Registration).

How NBTC Classifies Wireless Microphones

The NBTC certifies wireless microphones under the Wireless Microphone application, with certification class determined entirely by frequency band. There are no power-based splits — the classification is based on which frequency range the transmitter operates in. The 694–806 MHz range is divided into three permitted sub-bands, all requiring Class A registration. Microphones operating across multiple sub-bands within this range still require only one application; NBTC issues a single certificate covering all operating frequencies.

Certification Requirements

Application	Frequency Range	Max Transmit Power	Certification	Standard
Wireless Microphone	165–210 MHz	10 mW	SDoC	NBTC TS 1006-2568
Wireless Microphone	694–703 MHz	50 mW	Class A	NBTC TS 1006-2568
Wireless Microphone	748–758 MHz	50 mW	Class A	NBTC TS 1006-2568
Wireless Microphone	803–806 MHz	50 mW	Class A	NBTC TS 1006-2568

Frequency determines certification class: A product operating only in the 165–210 MHz band requires SDoC (~1 week). A product operating in any of the 694–806 MHz sub-bands requires Class A registration (~5 weeks). A product that covers both ranges requires only one application; since Class A is the higher class, a single Class A certificate will be issued covering all frequencies.

What This Covers

This page covers wireless microphone transmitters and receiver systems certified under the NBTC Wireless Microphone application. Typical products include:

Handheld wireless microphone systems (transmitter + receiver)
Lavalier (clip-on) microphone systems with belt-pack transmitters
Headset microphone systems
Conference and presentation wireless microphone systems
Stage and live performance wireless microphone systems
Multi-channel wireless microphone receivers

Note on video transmitters: Video transmitters operating in the 470–694 MHz range are certified under a separate NBTC application. If your product transmits video rather than audio, see the Video Transmitter page.

Required Documents

Document requirements differ by certification path. If your product operates in both the 165–210 MHz and 694–806 MHz ranges, Class A requirements apply to the combined application.

SDoC (165–210 MHz only)

Technical specification / datasheet with wireless communication details
Product photographs (exterior and label)
Test report from an accredited laboratory
Authorised declaration (manufacturer or authorised representative)

Class A (694–806 MHz, or combined with 165–210 MHz)

Technical specification / datasheet with wireless communication details
Product photographs (exterior and label)
Test report from an accredited laboratory outside Thailand
ISO/IEC 17025 accreditation certificate and laboratory scope
Authorised declaration (manufacturer or authorised representative)

Class A registration requires a local representative — a Thai juristic person holding a valid NBTC trade license and NBTC Supplier Code — to file on behalf of the overseas manufacturer. Zergo provides this as part of its certification service.

Estimated Timeline

SDoC (165–210 MHz):Approximately 1 week from submission

Class A (694–806 MHz, or combined):Approximately 5 weeks from submission

Adjacent frequency range — video applications

Video Transmitter

→

Ready to certify your wireless microphone for Thailand?

Zergo manages the full NBTC certification process for wireless microphones — including frequency-band classification, local representative filing for Class A products, and approval delivery.

View NBTC Certification Service →