Smart sensor: reliably detects open doors and windows, shows their status in the app and serves as a trigger for actions or scenarios in the Smart home thanks to the integrated button. Discreet design: door/window sensor with an extra-thin magnet (3 mm) fits into the overall living environment in an unobtrusive manner and can be fitted to windows – even those with multiple glazing. Save heating costs: window sensor detects open windows, enabling the smart radiator thermostats to be automatically turned down via the "Sustainable ventilation" service to save energy costs. Break-in protection: once integrated into the Bosch Smart Home alarm system, the door/window contact triggers an alarm when it senses the unauthorised opening of doors and windows. Maximum added value in the system: you need a Bosch Smart Home controller or Bosch Smart Home controller II to integrate the device into your Bosch Smart Home system. Box contents: 1x door/window sensor, 1x magnet, 1x CR123A battery, adhesive tape, user manual. Weight: 0.09479877266 Pounds. Manufacturer: Bosch. The discreet all-rounder for a better overview, break-in protection & sustainable heating: Door/window contact II (plus) Reliably detects open doors and windows - and the plus version even detects vibrations. Break-in protection and energy savings in one. The compact all-rounder, door/window contact II (plus) doesn't merely allow you to keep an eye on whether doors, windows, and more, are open or close - you can also save a lot of energy and protect your home from burglars. Here, you have the choice between the standard door/window contact II model and the door/window contact II plus model with an additional vibration sensor. Perfect overview. Running around the house is old news: thanks to your door/window contact (plus), you just need to look in the app to find out if a window or door is open or closed. If the status changes, you are informed according to your preference.