Although, most systems are based on ZigBee, Bluetooth and wireless USB,but there are not energy efficient. Thus, a low power consumption system can be utilized with the use of GSM or GPRS (General Packet Radio Service) technologies. The
system is composed of wireless security sensor nodes and a GSM/GPRS gateway. The GSM/GPRS gateway has the capability of informing the owner by SMS if any alarm is triggered. The system also implements an emergency alarm
button that, if pressed by occupants, will inform the owner of an emergency. The gateway is connected to the various
sensor nodes and alarms by means of wireless transceivers. The system also implements security features like door
switches to detect unauthorized entry or infra red sensors to detect human motion and notify the owner.