... ,Printer,GPRS,Touch screen.2.Option configuration:RFID,Camera,GPS,WIFI/Bluetooth,1D barcode scanner,2D barcode scanner,power adapter,CDMA ... least two SAM slotsWireless Communication UnitsRF module or wifi 802.11./b/g/n Ethernet 10/100Mbit internal Ethernet interfaceSerial PortOne asynchronous communication ...