BT21 Car Bluetooth FM Transmitter MP3 Player Dual USB Charger delivers in-car audio and charging in a single, compact device. It streams music via Bluetooth 5.0, plays MP3/WMA from USB drives or TF cards, and charges two devices at once.
Use it to upgrade an older car stereo: pair your phone, stream music, take hands-free calls, and charge devices during long drives.
- Dual USB ports provide simultaneous charging with a fast-charge option for quick power on the go.
- Bluetooth 5.0 enables stable wireless streaming and easy pairing with your smartphone.
- Inline controls manage calls, playback, volume, and FM frequency without taking your eyes off the road.
- Lossless audio decoding supports MP3 and WMA playback for clearer sound.
- Expansion slot accepts USB drives and TF cards; the device automatically recognizes playable formats.
- Digital display shows real-time voltage and transmission status; built-in protections guard against common faults.
Optional light specifications: Compact design with simple LED indicators for power, Bluetooth pairing, and charging status.
Fit: designed for in-car use with standard car interiors and FM radio compatibility.
