This is a GSM (Global System for mobile) is a wireless home security system that communicates with the GSM network using a sim card like your smartphone. A GSM home alarm systems is a wireless alarm system with a mobile telephone transmitter. If someone wants to disarm the home alarm system, it can be done by cutting the power lines or damaging the phone lines. However, The GSM alarm system will still function just fine with these lines cut because it uses battery powered and is independent from other supply lines. This is a DIY alarm system with no expensive installation costs. If you move the system’s flexibility means you can take the security systems with you. With the system linked up with the mobile network lets you monitor your home from anywhere in the world. GSM alarm systems communicate using a sim card, just like your smartphone therefore like the smartphone the sim card will have some kind of a pay subscription costs to link up with the cellular network. This system comes with 1-Control Panel, 4-door and window sensors, 4-motion detection sensors, 1-loud siren, 2-RFID Tags, 4-remote, warning signs, and no wires. In addition, you can add 84 more wireless devices for a total of 100 wire devices to the system.