With the Hombli Smart Bluetooth Contact Sensor, you receive a push notification on your smartphone as soon as a door or window is opened. The sensor can also be used as a trigger for automations. The Smart Bluetooth Contact Sensor utilizes energy-saving Bluetooth technology and requires a Hombli Smart Bridge. This way, you are always informed, whether you are at home on the couch, in the office, or even on vacation. The sensor features a compact and discreet design that blends seamlessly into any interior. It is ideal for doors and windows throughout the house. The Smart Bluetooth Contact Sensor can also be used as a trigger for automations, so for example, your smart lighting can automatically turn on when a door is opened. Or you can be notified if a window is still open and it starts to rain. The sensor requires a battery and achieves a lifespan of about one year with average use. The included 3M adhesive tape makes it easy to attach the two parts of the sensor to doors and windows as well as their respective frames. Since the sensor uses a Bluetooth connection, you will also need a Hombli Smart Bridge.