Size: 92*35MM Power supply voltage: DC6v-12v Power 50W, true stereo 2*25W 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 a U disk or TF card;) 4. Support power-off memory 6. The power supply voltage supports between DC6v-12v, and the current is between 1-3A. 7. It can be directly connected to the speaker, with a power amplifier and Bluetooth decoding function. 8. Support song format MP3 / WAV / APE / FLAC 9. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control/ 10. Power 50W, true stereo 2*25W. 11. 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? Package included: 1 x Audio Decoder Board Player 1 x Remote Control (without battery) 3 x Cables