GSM alarm system Modbus rtu terminal data controller cwt5002

3G modbus i/o module built in simcom sim5218 3g module CWT5002 Support 3G and 4G version ( skype:lisali1220) (Whatsapp:0086 13652426178) We Provide Free GPRS Server Software, Please contact us for more details Product Features DC Power supply 12-24V DC (Standard adapter: DC 12V/1.5A) Power consumption 12V input Max. 150mA/Average 50mA Frequency range Quad-frequency 900/1800/850/1900HMz SIM Card Supporting 3V SIM Card Antenna 50 Ω SMA Antenna interface Serial port Selectable