Turn Any Speaker or Car Stereo Into a Wireless Audio System

The Bluetooth 5.3 Wireless Audio Adapter is the easiest way to upgrade your car, home stereo, speaker, or TV to wireless audio streaming. Simply plug into any 3.5mm AUX jack and enjoy cable-free music, hands-free calls, and NFC-instant pairing — all in a compact, travel-friendly design. Made in Mainland China.

Why You'll Love It

Bluetooth 5.3 Technology: The latest generation Bluetooth delivers a stable, high-fidelity connection with enhanced sensitivity and virtually zero dropout for uninterrupted playback.
10-Metre Wireless Range: Built-in antenna minimises interference so you can move freely around your room or car without losing the connection.
Dual Device Pairing: Connect two smartphones simultaneously and switch between them effortlessly — perfect for sharing music with a passenger or co-worker.
U-Disk Playback: Insert a USB flash drive and play music directly, no phone required — great for road trips with a pre-loaded playlist.
Hands-Free Calling: Plug into your car's AUX port and instantly convert it into a hands-free calling system. Answer and end calls at the touch of a button for a safer driving experience.
NFC Quick Connect: Tap-to-pair on NFC-enabled devices for lightning-fast setup without menus or passwords.
Universal Compatibility: Works with 3.5mm headsets, home stereo systems, car stereos, Bluetooth speakers, and TVs. Supports SBC and AAC audio codecs.
CE Certified: Meets European safety and electromagnetic compatibility standards for peace of mind.

Technical Specifications

Bluetooth Version	V5.3
Output Interface	3.5mm AUX Stereo (L/R channels)
Bluetooth Protocols	A2DP, AVRCP
Audio Codecs	SBC, AAC
Frequency Range	2400–2483.5 MHz
Frequency Response	20 Hz – 20 kHz
Signal-to-Noise Ratio	90 dB
Total Harmonic Distortion	0.1%
Output Power	28 mW (RL = 16Ω)
Wireless Range	Up to 10 metres
Functions	Bluetooth audio, U-disk playback, Hands-free calling, NFC pairing
Dimensions (BLS-B21)	78 × 48 × 18 mm
Dimensions (BR06A)	54 × 54 × 13.7 mm
Certification	CE
Origin	Made in Mainland China

What's in the Box

1× Bluetooth Audio Receiver/Adapter
1× 3.5mm AUX Cable
1× Type-C Power Cable
1× Audio Cable
1× User Manual

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For more information on Bluetooth wireless technology standards, visit the NIST Communications Technology Laboratory.

Learn more: Bluetooth Low Energy

Frequently Asked Questions

Q: Can I use this Bluetooth 5.3 AUX adapter in my car?

A: Absolutely! Simply plug the adapter into your car's 3.5mm AUX input jack, power it via the included Type-C cable, and pair it with your smartphone. It doubles as a hands-free calling system, letting you answer calls safely while driving.

Q: Does this adapter work as both a receiver and a transmitter?

A: Yes. In receiver mode it wirelessly streams audio from your phone to a wired speaker or car stereo. It also supports U-disk (USB flash drive) playback so you can listen to stored music without a phone connected.

Q: How many devices can I connect at the same time?

A: The adapter supports dual-device pairing, meaning you can connect two smartphones simultaneously and switch between them without re-pairing — ideal for sharing music with others or switching between your personal and work phone.

Q: What audio quality can I expect from this wireless audio adapter?

A: Thanks to Bluetooth 5.3 with SBC and AAC codec support, a 90 dB signal-to-noise ratio, and only 0.1% total harmonic distortion, the adapter delivers crisp, clear stereo sound across the full 20 Hz–20 kHz frequency range.