Door and Window Sensor - Compatible with Other Aqara Smart Home Products - Apple Homekit Compatible - Zigbee Wireless Connectivity - Android and iOS Compatible App
The new Xiaomi Aqara Door and Window Sensor is what you were looking for. This Xiaomi Aqara product is a smart sensor to be installed on any door and window and detects when it opens and closes through the distance between the sensor and the magnet. Do you often forget to close a door or window? Well, just need to grab your smartphone to know. With the Android and iOS compatible app, you can always be on the lookout, even when you're away from home. The system operates on a button cell, so it consumes very little power, with a battery life of over two years.