811BT 12V 2 x 20W Amplifier Bluetooth MP3 Decoding Board 1. Bluetooth version: 5.0 2. Support call (long press the pause button to answer the call when there is an incoming call) 3. Support 3.5MM head microphone function 4. Support recording, recording supports operation in TFUSB 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, U disk or TF card) 5. Support power off memory 6. Power supply voltage: support DC 6-18V, current 1-3A 7. Can be directly connected to speakers, with power amplifier and decoding functions 8. Support song format: MP3 WMA WAV APE FLAC 9. Main function: MP3USBTFLINE INFMBLUETOOTHremote control (you need to bring your own CR2402 button battery) 10. Power: 40W 11. Supports folder selection and playback: 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 next button twice to select the folder to play the song, and the screen will display accordingly 12. Size: about 9.3x2.5cm 13. Weight: about 38g