1- Detecting if a window or door is closed in real time via APP. 2- Connecting with other smart gateway devices to control your life easily. 3- A sensor subject and a magnet included to ensure accurate detection. 4- Mini sized, simple operation, no need other tools. 5- Power by button battery for long endurance. 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: Aqara Model: MCCGQ11LM Material: Plastic Color: White Battery: CR1632 Working temperature: -10 - +50 Working humidity: 0 - 95% RH Max. sensing distance: 22mm App: 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 / 0.56oz Package weight: 63g / 2.22oz Item size: 42 * 22 * 11mm / 1.65 * 0.87 * 0.43in Package size: 110 * 77 * 27mm / 4.33 * 3.03 * 1.06in Note: Item color may show slight aberration due to different shooting light and monitor display. Package List: 1 * Sensor Unit Other smart devices on the picture are not included 1 * Magnet 2 * Sticker 1 * Quick Start Guide 1 * Sensor Unit Other smart devices on the picture are not included 1 * Magnet 2 * Sticker 1 * Quick Start Guide