This central alarm system coordinates multiple sensor inputs and sends alerts of activity directly through the system, sets off audible alarms, can also call up to 6 phone numbers and send out SMS text alerts whenever 1 or multiple sensors are triggered. If you want phone alerts and text messages to be sent, you can install a SIM card (not included) with your preferred carrier that will relay these alerts through cellular towers, so a wifi network and internet access are not necessary.

Available Sensors that interface with this Home Alarm System:
IR-G02 infrared sensor
DS-G02 door/window sensor

The Home Alarm System includes
(1) central GSM Alarm System
(1) wireless IR sensor (IR-G02)
(1) wireless door/window sensor (DS-G02)
(1) audible alarm siren
(2) wireless key fobs to remotely control the system

The key fobs have settings for arm/disarm, "home" (activates peripheral sensors only), and "silence" (stops an active alarm).

Additional sensors can be purchased to interface with the system and cover larger areas (up to 8 wired, and 99 wireless). Types of sensors include IR (heat & motion) sensors, door/window gap sensors, vibration sensors, broken glass sensors, smoke alarms, natural gas, liquid propane gas, carbon monoxide sensors, and water level sensors (for basements or areas where pipes may burst). For example, in addition to a normal security setup with motion detectors and door and window sensors, this system can also be interfaced with gas leak and smoke alarm sensors, and send out alerts accordingly.

This excellent programmable home alarm system is expandable to provide coverage for a small home with a few rooms, up to a large multi-room or multi-building estate with sizable grounds.