... modem, RS232 modem, GSM IP modem, GPRS data modem, data terminal,GPRS DTU, TCP/IP modem, Support transparent data transfe, gprs ip modem, gsm modemgprs modem with ... output function. Ideal for M2M fields, smart grid, industrial automation, telemetry, finance, POS, water supply, ... 50 ohm, lighting protection(optional)SIM/UIMStandard 3V/1.8V user card interface, 15KV ESD protectionPowerTerminal block ...