Bosch Smart Home door/window contact II [+M], sensor for energy efficient heating, flexible use in the system or manufacturer independent Matter systems, set of 3

- This Bosch sensor lets you check the status of your door and window using Bosch Smart Home App - Left a window open? Just ask Siri, Alexa, or Google Assistant and get the lowdown instantly - With the ventilation service, it helps reduce energy waste by managing heating - Stick it on any door or window, it is weatherproof, so it won't mind a bit of drizzle - Pause the sensor when you're popping in and out, or use the button as a smart control for other devices