3X 151039A0 Concealed window and door contacts, 3 pieces

Homematic IP Smart Home Window and Door Contact - Concealed Installation

Reliably detects when windows and doors are open or closed using an integrated infrared light barrier - INSTALLED OUT OF SIGHT

The Homematic IP window and door contact for concealed installation discreetly monitors doors and windows within the Homematic IP smart home system. The 15 mm-thick sensor is easily attached to the inside of the frame in just a few simple steps, where it reliably detects the current status of the window using a light barrier. Once installed, the window and door contact enables the room temperature to be automatically lowered when ventilating or triggers the Homematic IP siren in the event of unauthorized access by third parties. A built-in tamper contact reliably detects any unauthorized tampering with or removal of the sensor. The Homematic IP app also displays the current status at any time. Two micro-batteries power the sensor for up to four years.