The motherboard comes with NAND Flash memory, which can store voice files, and the USB interface supports U disk mode.
The motherboard integrates two independent MP3 playback systems, which can play the main music and background music at the same time, and use the remote control to switch the files at any time. Dual with isolated RS485 channel, can work in networking. The breaker interface can directly drive 8 12 relays, 5 infrared and Hall sensor interfaces, one coin acceptor interface, one SD card, two RSL interfaces, one load cell interface and so on.