It consists of a microcontroller and a GSM modem. It does not consist of any ON-OFF switch and coded SMS messages are received for switching ON and OFF the system. In the same way after receiving the switching ON /OFF message, Modem also sends confirmation message to the programmed mobile number that it has been switched ON/OFF.  When the security system is made ON by the sending the coded SMS message, it is ready for sending alert SMS messages along with ring to the two stored mobile numbers if any sensor gets activated. Any two mobile numbers can be programmed by using any Wi-Fi compactable device.