... Support transparent data transfe, gprs ip modem, gsm modemgprs modem with rs232 rs485 io for m2m meter readinggprs modem(DTU) with I ... , ADC, input pulse counter and pulse wave output function. Ideal for M2M fields, smart grid, industrial automation, telemetry, finance, POS, ... and BandEGSM900/GSM1800MHz, GSM850/900/1800/1900MHz(optional)Compliant to GSM phase 2/2+GPRS class 10, class 12(optional) ...