... , dual sim router, dual band wireless router, dual 3g router, dual router, 3g sim router, huawei wireless sim router, dual card wifi router, 3g+wifi router, dual 3g ... RS232(or RS485/RS422) port, 15KV ESD protectionData bits: 5, 6 ,7, 8Stop bits: 1, 1.5, 2Parity: none, even, odd, space ...