1. Bluetooth version 5.02. 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 memory5. The 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 amplifier and decoding functions.7. Support song formats MP3/WAV/APE/FLAC8. Main functions MP3/USB/TF/LINE IN//BLUETOOTH/remote control/9. 6W, true stereo 2*3W.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? .remote control supply: 1 X CR2025 batteries (not included)Colour:blackMaterial:plasticSize:75 x 50MMPackage Contents:1 x Decoding board1 x remote control (no battery included)4 x cableOnly 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.