The product model of AQARA door sensor is MCCGQ11LM. Aqara smart windows door sensor can detect the opening and closing of door and windows and send a notification to your phone via the APP. With the ability of matching with other / smart devices such as gateway remote control, smart bulb, air cleaner, etc. this sensor is able to help you create a smart home. The windows door sensor consists of a sensor subject and a magnet. It detect the opening and closing of door and windows by sensing the near and separation of the sensor subject and magnet. Main Features： / Original Aqara smart door and windows sensor compatible with daily security / ZigBee wireless connection / Trigger and alarm: it will light and ring when someone open the door, the light will automatically turn on when someone push the door / Away from home mode: If someone broke into, the bell will ring . / Intelligent sensors: open the window let fresh air into room / Small size, easy to install / Max. sensing distance: 22mm / Working temperature: -10 - 50 Deg.C / Working humidity: 0 - 95pct RH / Built-in 1pc CR1632 cell battery Notice