Product Description:1. Support TF card, plug, and play, and play music as you like2. High-quality bluetooths decoding chip used, lossless music transmission3. With memory function, after successful pairing for the first time, it can be automatically connected after subsequent power-on, without re-pairing4. The knob of the bluetooths receiver provides two sound selections, bass mode, and 3D mode, connect to the stream and control your music within a 50-70 feet rangeProduct parametersBluetooths version: V5.1One-touch connectionBluetooths transmission distance: 10 metersFrequency: 2.4GhzProduct size: 69X69X24mmPower supply: DC5VFunction: AUX audio output/coaxial output/TF card playbackProduct ListHost *1Audio cable *1RCA cable *1Power supply line *1Manual *1