Bosch Smart Home Door/window contact II, white, pack of 3

The smart door/window contact II reliably detects open doors and windows and always displays the status in the app. It reacts in a variety of ways: for example, it throttles smart radiator thermostats for sustainable ventilation or triggers an alarm in the alarm system. The extra-thin magnetic unit is inconspicuously attached to or on the window sash.
The integrated button can be used as an additional control element to trigger freely definable actions or scenarios. The integration into Apple HomeKit, Amazon and Google Home also enables a combination with compatible products from other manufacturers.