Eve Door & Window Wireless Contact Sensor
This device can sense whether your door or window is open or closed and share that data with the app on your iPhone or iPad. Equip it to automatically control other HomeKit-enabled accessories throughout your home. And receive notifications while you’re on the go, courtesy of your ever-present home hub.
It is powered by a long-lasting, replaceable battery, and boasts truly wireless, energy-efficient operation thanks to Bluetooth low-energy technology.