... transfer 4. Support DDNS IP modem, RS232 modem, GSM IP modem, GPRS data modem, data terminal,GPRS ... Support transparent data transfe, gprs ip modem, gsm modemgprs modem with rs232 rs485 io for m2m meter ... to your existing serial devices with only basic configuration. It has low power consumption, 1ower than ... GSM1800MHz, GSM850/900/1800/1900MHz(optional)Compliant to GSM phase 2/2+GPRS class 10, class ...