Outstanding Features: No need to connect to telephone/landline, uses GSM (SIM card). Can be set ON to receive mobile SMS/alerts. Composing messages, message to control the system. AC power failure and on message alert Mobile text message alert when alarm Features Long-distance control under password protection. Long-distance control to set the alarm host by phone or other communication tool. Built in back up power, when mains power is disconnected. User friendly. Arm/disarm via remote control key fob. Set Siren`s hooting time Time delay to arm/ alarm Program the duration length of the siren Able to link up to the monitor center through an ID code. Separately alarm/disarm for certain detected areas Power supply: Input AC 110V; 220V; 230-240V; Output DC 9V, 300mA Build-in transmitter: 315MHz/433MHz Frequency: 900/1800/1900 MHZ Stand-by current: < 20mA Alarm current: < 150mA Operating range: up to 150 meters in open place Siren: > 110db Temperature range:-10 ~ 50 degree Relative humidity: < 90% Dimension: 340x 250 x 78mm (Gift box) Net weight: 1.2kg