2-in-1 Bluetooth 5.4 Audio Adapter – AUX Receiver & Transmitter

2-in-1 Bluetooth 5.4 Audio Adapter – Wireless AUX Receiver & Transmitter

Transform any wired speaker, car stereo, or headphone into a wireless Bluetooth audio device — or stream audio from a non-Bluetooth source to your Bluetooth earbuds. This compact 2-in-1 Bluetooth 5.4 adapter switches seamlessly between RX (Receiver) and TX (Transmitter) modes, giving you total flexibility for home, car, and on-the-go use.

Key Features

• Bluetooth 5.4 — faster pairing, more stable connection, and extended wireless range up to 10 metres in open areas
• 2-in-1 RX / TX Modes — use as a receiver to stream music wirelessly to a wired speaker, or as a transmitter to send audio from a non-Bluetooth device to your wireless earbuds/speakers
• 3.5mm AUX Connection — universal compatibility with car stereos, home hi-fi systems, speakers, and headphones
• Built-in 180mAh Battery — rechargeable via USB 2.0; red LED stays on during charging and turns off when fully charged
• LED Status Indicators — blue light flashes/stays solid in RX mode; red light flashes/stays solid in TX mode for at-a-glance status
• Ultra-Compact Design — measures just 94 × 20 × 12 mm and weighs only 38 g; slips easily into a pocket, bag, or glovebox
• Car-Ready — officially supports vehicle-mounted use, making it a simple upgrade for older car audio systems
• Internal Antenna — clean, snag-free design with no external antenna

Specifications

How to Use

RX (Receiving) Mode — Stream to a Wired Speaker

1. Press and hold the power button for 3 seconds to turn on.
2. Switch the mode button to the RX position — the blue light will flash.
3. Open Bluetooth on your phone, search for M1, and tap to connect. The blue light stays solid once connected.

TX (Transmitting) Mode — Send to Wireless Earbuds/Speakers

1. Press and hold the power button for 3 seconds to turn on.
2. Switch the mode button to the TX position — the red light will flash.
3. Put your Bluetooth headphones or speaker into pairing mode; the adapter connects automatically. The red light stays solid once connected.

What's in the Box

• 1 × Bluetooth 5.4 Audio Adapter (M1)

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Frequently Asked Questions

Q: What is the difference between RX and TX mode on this Bluetooth adapter?

A: In RX (Receiver) mode, the adapter connects to your phone or tablet via Bluetooth and outputs audio through its 3.5mm AUX port to a wired speaker or car stereo — essentially making a wired device wireless. In TX (Transmitter) mode, the adapter plugs into a non-Bluetooth audio source (like a TV or old stereo) and wirelessly streams that audio to your Bluetooth headphones or speakers.

Q: How do I charge the Bluetooth 5.4 adapter?

A: Connect the adapter to any USB 2.0 power source using the included USB cable. The red LED indicator stays on while charging and switches off automatically when the 180mAh battery is fully charged.

Q: Is this Bluetooth adapter compatible with car audio systems?

A: Yes — the adapter officially supports vehicle-mounted use. Simply plug it into your car stereo's 3.5mm AUX input in RX mode and pair it with your phone to stream music wirelessly, giving older car audio systems a quick and easy Bluetooth upgrade.

Q: What should I do if my Bluetooth earphones won't connect in TX mode?

A: First, confirm the adapter is set to TX mode (red light flashing). Some Bluetooth earphones require a factory reset/initialization before they can pair with a new device. Refer to your earphones' manual to reset them, then attempt pairing again with the adapter in TX mode.