... wireless router 2.HSUPA 850/900/1900/2100MHz 3.Ethernet Port, serial port 4.build in module 5. wifi EF3433 industry 3g wifi ... )SDRAM32MB(Extendable to 64MB)Interface TypeItemContentWAN1 10/100 Mbps WAN port(RJ45), auto MDI/MDIX, 1.5KV magnetic isolation protectionLAN4 10 ... /MDIX, 1.5KV magnetic isolation protectionSerial1 RS232(or RS485/RS422) port, 15KV ESD protectionData bits: 5, 6 ,7, 8Stop bits: 1 ...