... modem 3G modem M2M GPRS Modem With RS232 RS485 for Meter Reading Temperature and Humidity Monitoring (F2103I)Designed with ... communication in real-time, etc. It has been used for data communication/acquisition, remote control and minotring, M2M appliation, ... SMA female interface, 50 ohmSIM/UIM interface: Standard user card interfacePower interface: Standard 3-PIN power jack3. Power supply Standard ...