1. Bluetooth version 5.0 2. Support calls (long press the pause button to answer the call when there is an incoming 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 recording file; exit the recording mode and long press the pause button to exit. When recording, you need to connect a storage device, such as: U disk or TF card;) 4. Support power off memory 5. The power supply voltage supports between DC 7v-20v, and the current is between 1-4A. 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 80W, stereo 2*40W.