1. Bluetooth version 5.0 2. Support calling (long press the pause button to answer the call when there is a call). 3. Support recording. Recording only supports operation in TF mode or USB mode.(Long press the MODE button to recording, long press the MODE button again to cancel the recording and play the recorded file; exit the recording mode and long press the pause button to exit. When recording, you need to a device, such as a U disk or TF card;) 4. Support -off memory 5. The supply voltage supports between DC 8v-24v, and the current is between 1-4A. 6. Can be directly connected to speakers 7. Support song MP3/WMA/WAV/APE/FLAC 8. Main functions MP3/USB/TF/LINE IN//BLUETOOTH/remote control 9. Stereo 2*40W. Woofer 80W 10. Support folder to play. When USB or TF is playing, there is a folder in the device and there are songs in the folder. Press the previous button or the button twice to select the folder to play songs, and the screen will display F001-F00? and so on, yes? A folder displays F00? . Time setting operation : short press the clock button, enter the clock mode, the screen flashes at the hour number position, then the button and the previous button to adjust the time to be set, and then short press the clock mode to enter the minute setting. After the adjustment is completed, press the clock button again to confirm the current time setting. Colour:black Material:plastic Package Contents: 1 x decoder 1 x remote control A 4 x cable Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.