Power: DC 9V~28V
LAN: Connect to PC with crossover Ethernet cable
USB interface: U-Disk (up to 2G), USB mice, USB keyboards
SD card: Up to 8G
Serial:RS232 and RS485
ST-eWin7000 can be a displayable terminal control
device and connected to subordinate computer (MCU) through RS232.
The advantage of separating display interface from control system 
is making the systems independent and upgrading conveniently.
Audio output port: Connect to Stereo headphone output or speaker
http://www.stone-lcd.com