Model: s150 Name: gsm gprs 3g 4g sms controller alarm Keyword: Gsm gprs 3g 4g sms controller, gsm gprs 3g 4g sms alarm, gsm gprs 3g 4g rtu, gsm gprs 3g 4g sms rtu, gsm gprs 3g 4g remote controller, gsm gprs 3g 4g sms remote, gsm gprs 3g 4g relay, gsm gprs 3g 4g switch. Gsm gprs 3g 4g pump monitoring. The gsm 3g 4g sms controller alarm is special for remote switch on/off machine, equipments, and also it supports digital inputs for different detectors like water level detectors, pir motion detectors and so on. One of the advantages of them is when the inputs recovery can alert by sms, and with one interlock relay output, one sms command switch on/off relay output. When alarm occurrence, will send definition sms text and dial the user mobile phones. Mainly features: 1.Gsm frequency: 850/900/1800/1900mhz; 2.1 independent output relay (240vac3a) can be switched on/off by sending a sms text; 3.1 alarm-link output relay (240vac3a) can be switch on 0-120minutes if controller unit triggered; 4. 2/4/8 alarm logic digital inputs, nc or no and eol is optional; 5.3 sms alert numbers and 5 alarm dial telephone numbers can accept to the alarm message; 6.Two-way voice communication by external microphone and speaker; 7.Supports armed, disarmed, inquiry status, switch on/off output relay by sms commands; 8.Password protected, prevents unauthorized user; 9.Can be set up and programmed from pc configurator by usb cable; 10.Time stamped alarm messages. 11.Backup rechargeable battery inside, can work for 24hours when ac power goes off. 12.Can be operated from anywhere, no distance limit; 13.Based on gsm network, applied to many applications.