Specifications: 1. Bluetooth version 5.0. 2. Amplification chip using TPA3116. 3. Support call (long press the pause button to answer the call when the call comes). 4. Support recording. Recording only supports TF mode or USB mode operation. (Long press the MODE button to start recording, long press the MODE button again to cancel the recording and play the recording file; long press the pause button to exit the recording mode. When recording you need to connect a storage device, such as a U disk or TF card;) 5. Support power failure memory. 6. Power supply voltage support between DC 8v-24v, current between 1-4A. 7. Can be directly connected to the speaker, with an amplifier and decoding function. 8. Support song format MP3 / WAV / APE / FLAC 9. Main functions MP3 / USB / TF / LINE IN / FM / BLUETOOTH / remote control. 10. Overall power is 100W, 2 channels 50W each. 11. Support folder selection playback. Press FD+ for the next folder Press FD- for the previous folder Package includes: 1 x Audio Decoder Board Player 1 x Remote Control (without battery) 3 x Cables