security system
However, it is more typical to see motion detectors now since technology has improved alarm systems. These motion detectors act much like wires but they use infrared beams instead of wires. Once these beams are crossed or disturbed in any way by some object, the alarms will go off. Motion detectors are not to be used in a house that is full of pets. Detectors are a great gadget because they can also be connected wirelessly to other components like wireless cameras and computers. LocksContractors know that every house needs good locks.