1 channel DB9 interface（COM1）.
1 channel 3-wire RS-232 serial port（COM2）.
1 channel RS-485 interface（COM3）.
4 channel IO input interface,3 channel IO output interface.
1 channel USB Device interface，support ADB connect to PC to exchange date and debug application .
2 channel USB Host interface, support usual USB device such as mouse, keyboard, U disk ,etc.
1 channel external antenna interface.
1 channel 100M Ethernet interface.
1 channel SD/MMC slot,support TF card.
1 channel audio output interface .
2 channel built-in speaker interface.
1 channel 4G SIM card interface .
2 channel DC 12V~24V ,industrial power solution，higher reliability.
Built-in 4G ,WIFI ,Bluetooth module (optional) .