Wireless Alarms are used when the premises is already built and has not been wired for an Alarm System. These systems are easily installed with-out any mess or disruption around the home or office
Wired Alarms These systems require wires to be run from the control panel to each device, for example the sensors, keypad, bells. Unlike a pre-wired alarm it is very hard to conceal the cables in a wall and therefore will be visible all around the home.
Pre Wired Alarms does not necessarily mean the house is wired for what you would like in a security alarm system, in fact many are even wired below industry standards. But if your home isn’t wired then you may need to have a wirefree system installed