Features: 1) Adopts GSM network, no distance limit when sounding alarm 2) Can support GSM/CDMA cell phones, with English text message function 3) Can store five alarm phone numbers and room number message which can be sent to the owners, policeman and monitoring center 4) Long distance arming, disarming, panic alarm and monitor functions; people can clearly hear the voice on the spot 5) Set up with password which guarantees the safety of the system 6) Owners can control a small household through a cell phone or telephone when they are out 7) All kinds of wireless detectors are compatible with the system, such as door sensors, P.I.R detectors, remote controls, gas sensors, smoke detectors, panic buttons and infrared sensors 8) No need for telephone line, very suitable for garages, warehouses, storage facilities, shops and other places without a network 9) Can work with wired and wirless detectors Specifications: 1) Power adapter: a) Input AC 220V; 230-240V; 110V b) Output DC 9V, 300mA 2) Wireless frequency format: 900/1,800MHz; 315MHz/433MHz 3) CE and FCC,ISO certified