YALE EF-PIR Easy Fit Wirefree PIR DetectorA wire free PIR motion detector for use with the Yale Easy Fit range of alarms, it activates the alarm when it detects movement. Ideally placed in the corner of any room When the alarm is set, the infrared sensor will pick up movement and activate the siren For use on extra rooms that need protection, such as lounge, bedroom or extension Suitable for garages & outbuildings Can be added at the time of installation or at a later date