Feature:1. Detecting if a window or door is closed in real time via APP.2. Connecting with other smart for gateway devices to control your life easily.3. A sensor subject and a magnet included to ensure accurate detection.4. Compact sized, simple to operate, no need other tools.5. Power by button cell for long endurance.Specification:Note: This product is ecological chain brand product, there is no any marks on the products, please note it.Description:This door and window sensor installed on your door or window at home to always know if they are opened or closed, smart connection with other Aqara smart accessories via APP make your life easier and convenient.Feature:- Detecting if a window or door is closed in real time via Aqara or Home APP.- Connecting with other smart gateway devices to control your life easily.- A sensor subject and a magnet included to ensure accurate detection.- Mini sized, simple operation, no need other tools.- Power by button battery for long endurance.Specifications:Brand: AqaraModel: MCCGQ11LMMaterial: PlasticColor: WhiteBattery: CR1632Working temperature: -10 - +50Working humidity: 0 - 95% RHMax. sensing distance: 22mmApp: For switch Home app (iOS 10.3 or later),Aqara Home app (Android 5.0 or later, iOS 10.3 or later)Product weight: 16g / 0.56ozPackage weight: 63g / 2.22ozItem size: 42 * 22 * 11mm / 1.65 * 0.87 * 0.43inPackage size: 110 * 77 * 27mm / 4.33 * 3.03 * 1.06inNote:Item color may show slight aberration due to different shooting light and monitor display.Package List:2 * Sensor Unit Other smart devices on the picture are not included2* Magnet 4 * Sticker2* Quick Start GuidePackage List:2 * Sensor Unit Other smart devices on the picture are not included2* Magnet 4 * Sticker2* Quick Start Guide