GSM alarm System. 1.With color LCD show screen and keyboard on the host.2. 11 wireless guarding zones (1 wireless SOS zone, 1 fire alarm zone, 1 external power failure alarm zone , and other 8 wireless guarding zones can be defined by user ).3.Send SMS to 3 pre-set mobile phone numbers automatically while alarming.4.Call 3 pre-set phone numbers automatically and monitor at site while alarming.5.Set the time of arm/partial arm/disarm.6.Arm/disarm by the keyboard on the host, remote controller or SMS.7. Program the alarm host by keyboard or SMS.8. Modify the name of 8 wireless guarding zones and inquire the status of host by SMS demand.9. Define the 8 wireless guarding zones as arm/partial arm by keyboard on the host.10. With standby rechargeable battery 11. The host automatically stores system status, while its power is off.12.Connect with the alarm center through GSM network. Specification Zone* 11 Wireless guarding zonesWorkingfrequency betweendetector andalarm host.(315M/433M optional )* GSMGSM frequency: 900/1800MHz & 850/1900MHz (optional)Consumption: 1W(while sending message) * LCDshow* External power failure alarmStart-time: less than 1s* Alarm response timeLess than 8s (GSM in normality) * The volume of sirenMore than 110dbPowerPower requirements: AC 220V 50Hz (optional)Working power consumptionless than 3W Standby batteryDC 8.4V Standby battery working hours: more than15 Hours* Working conditionsOperating temperature: -20 60 Humidity: 20% to 95% * Weight of alarm hostNet weight: 0.5Kg Gross weight: 0.75Kg * Dimension of alarm host Dimension: 160mm(Long)×113mm(Wide)×38mm(High)