BT Wireless Door Alarm & Internal Siren (battery powered).

Very simple Wireless Door Alarm supplied with a Battery Powered Internal Siren & Remote Control, simple Alarm for use on many types of buildings including Sheds, Garages, Workshops, Boats, Caravans, Fuel Tanks etc. The Battery powered Magnetic Contact would be fitted onto a Door or Window with the Magnet being fitted onto the adjacent frame, when the Door or Window is closed the both parts would need to be within 5 mm of each other (in some installations you would choose to reverse the two components making for a neater installation). When the Door or Window is opened, the Contact will send a Wireless signal up to 50 metres away to all of the Sirens & PIR's operating within the same wireless network., Manufacturer: Ultra Secure Direct