[Notes]An Aqara Hub is required and sold separately.(NOTE:Not support hubs from other brands.) Requires a secured 2.4 gigahertz Wi-Fi network connection for Hub M2/ M1S/ E1/M1S Gen2 and Camera Hub G2H Pro/ G2H, and 2.4/ 5 GHz Wi-Fi for Camera Hub G3.(Wired connection via Ethernet RJ45 for Hub M2 is also supported)

[Proximity] For a sturdy connection, ensure that the Aqara Door and Window Sensor is within 400 inches of the Aqara Zigbee hub, and the hub is within the same range from the Wi-Fi router. Additionally, make sure the hub and the router are on the same local area network (LAN). Zigbee2MQTT and comparable third-party USB dongles are not officially supported by Aqara. Full product functionality may be limited or unavailable.

[Unauthorized Entry Detection & Home Automation] The Zigbee Door Sensor alerts your phone and triggers the Aqara Hub's local alarm upon unexpected door/window openings. It also controls other Aqara devices based on door/window status. Conveniently check your door or window, kids room and anywhere you want to be notified.

[0.86 Inch Wide Gap Allowed]The Aqara Door and Window Sensor works with most types of doors, windows, and other fixtures with similar mechanism, such as drawers, cabinets, and more.(Note: Please ensure that the surface where you plan to stick the Aqara Zigbee Door and Window Sensor is flat and easily adhesive, and the allowed gap between the door is up to 0.86 inch.) The main sensor unit dimension:1.61*0.87*0.43 inch, the magnet dimension:0.79*0.39*0.39 inch.

[Hands-Free Voice Control] Enjoy a hands-free experience compatible with Apple HomeKit and Alexa. No need to go downstairs or pick up your phone again. You'll always know whether your home door is opening or closing. This sensor must be paired with an Aqara Hub to function. Note: This sensor requires an Aqara Hub (sold separately) to function. Without the hub, it cannot send notifications, trigger automations, or connect to HomeKit, Alexa, or IFTTT.