This IF board can work with any root android tablet or mobile phone(OS version >3.0) with one single USB cable, it expands 2 RS232 port, 3 USB port,1 Buzzer,1 cash drawer port,1 LED indicator, and power on./off switch. Also including a RTC powered by battery.

Features:

1. Power control (on/off)

2. Input 12V, with over voltage protection

3. Supply LCD back light driving voltage 9V or 19V. (jumper select)

4. One USB from host, expands 3 USB ports (by GL850),3 UART ports

5. The IF board emulated as  a standard printing class device (PID=0x100,VID=0X4444), easy controlled by host operation system such as android, apple os/2, windows, linux.....