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 start 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 connect a storage device, such as a U disk or TF card;) 4. Support power-off memory 5. The power supply voltage supports between DC 5v-12v, and the working current is between 1-3A. A single USB discharge supports a maximum current of 2A, and the size of the current is determined by the input voltage and data line to determine the final output value. 6. Can be directly connected to speakers, with power amplifier and decoding functions. 7. Support song formats MP3/WAV/APE/FLAC 8. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/ 9. Power 6W, true stereo 2*3W. 10. Support folder selection to play. When USB or TF is playing, there is a folder in the device and there are in the folder. Press the previous button or the button twice to select the folder to play , and the screen will display F001-F00? and so on, yes? A folder displays F00? . remote control Power supply: 1 X CR2025 batteries (not included) Colour:black Material:plastic Size:75 x 50MM Package Contents: 1 x Decoding board 1 x remote control (no battery included) 4 x cable Only the above package content, other products are not included. Note: Light 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.