The Uni-Com Remote Control PIR Sensor Alarm offers a quick and simple way to help protect your home from burglars. When armed the loud 96 dBA siren sounds when movement is detected. The alarm can be quickly and easily armed/disarmed using the supplied remotes. The fully adjustable mounting bracket (fixings supplied) enables the PIR to be angled ensuring maximum protection. Suitable for use in and around the home, garages, sheds, caravans and boats. The PIR is powered by 3 x AA batteries (not supplied). Each remote is powered by 3 x LR44 button cell batteries (supplied). Comes complete with easy-to-use operating instructions. Specification: Sensor Dimensions: 6.5 x 10.5 x 6cm (approx.)