These are custom made kits including an alarm panel (brain), passive infra-red detectors, a key-pad for arming and disarming, a radio receiver to communicate with an armed response company, a siren to sound an alarm, and outdoor motion detectors. They can be made as large and complex as required or as small and user friendly as possible.
New on the market- AJAX WIRELESS ALARM- a totally wireless alarm system. All PIR’s, beams and the Hub are wireless and can be mounted anywhere without any cabling. This system uses your wifi network to communicate between equipment and one can install a separate sim card as a back-up should the wifi be down.