Thieves generally have the intention of not being caught by anybody. So they will choose to enter a house without security system rather than choosing houses with home security systems. Though it is quite expensive, it is better to have one. Proper understanding and research about the system would help in choosing the right one. First step is to research our home and find out how many doors and windows are there, which require sensors. Find out proper location for placing the control panel and the keyboard. Find out the length of the cable or the wire required in case of wired security systems so that the control panel can be connected with the sensors. In case of wireless systems, we have to find out, how far the sensors can communicate with the control panel, so that we can buy according to the sensitivity obtained and the distance between the control panel and the sensor’s location. We have to decide whether we need a 24 hour monitoring system, which will have a central monitoring station functioning locally to watch our home for intruders on monthly fee basis or basic sensor with dialer is enough, which will dial certain numbers or sound an alarm, when the security is breached. False alarm conditions should be thoroughly analyzed before buying, so as to avoid nuisances. We have to choose user friendly kit with additional accessories like the fire alarm, smoke alarm and so on.