1. Bluetooth version 5.0 2. Support calls (long press the remote control pause button to answer the call when there is an incoming call). 3. Support 3.5MM head microphone function 4. Support recording. Recording only supports operation in TF mode or USB mode. (Long press the remote control MODE button to start recording, long press the remote control PLAY button to switch between recording and music playback; when recording, you need to connect a storage device, such as: U disk or TF card;) 5. Support power off memory 5. The power supply voltage supports between DC 6v-12v, and the current is between 1-3A. 6. Can be directly connected to speakers, with power amplifier and decoding functions. 7. Support song format MP3 /WMA / WAV / APE / FLAC 8. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/ 9. Power 40W, stereo 2*20W. 10. Support folder selection and playback. When USB or TF is playing, when there is a folder in the device and there are songs in the folder, press the previous button or the next button twice to select the folder to play the song, and the screen will display F001-F00? and so on, yes? F00 is displayed for each folder? .