1. Bluetooth version 5.0 2. Support 6.5mm microphone and 3.5mm earphone functions 3. Support calling (long the pause button to answer the call when there is a call) 4. Support recording. Recording only supports operation in TF mode or USB mode. (Long the MODE button to start recording, long the MODE button again to cancel the recording and play the recorded file; exit the recording mode and long the pause button to exit. When recording, you need to connect a storage device, such as a U disk or TF card;) 5. Support power-off memory The power supply voltage supports between DC 8v-24v, and the current is between 1-4A. Can be directly connected to speakers Support song format MP3/WMA/WAV/APE/FLAC Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/ Power 160W, stereo 2 x 80W. Support folder selection to play. When USB or TF is playing, there is a folder in the device and there are songs in the folder. the previous button or button twice to select the folder to play songs, and the screen display F001-F00? and so on, yes? A folder displays F00? . Color: Black Material: plastic Package Contents: 1 * Bluetooth Amplifier Decoder Board 3 * Cable 1 * Receiver Cable 1 * Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.