... RISC CPU 2,RS232/RS485 port F2103 GPRS MODEM(DTU) with RS232/RS485 for automotive meter reading F2103 GPRS MODEM ... used on finance, water supply, environment protection, electric power system, post and weather fields.Wireless SpecificationEGSM900/GSM1800GPRS multi ... -powered MCU, 100M Interface: RS232/RS485 serial port, rates: 110~230400bits/s Indicator lights: “Power”, “ACT”, “Online” Antenna interface ...