Mi Door and Window Sensor 2 is a smart door and window opening sensor. The sensor is synchronized with your smartphone and devices of smart home system, so you can monitor the status of your doors 24/7. This gadget is especially useful if you have pets. Thus, you can install it on your pet's house and always know when it leaves it. In addition, if the sensor is installed on the door, it will become an element of protection for your home, since wherever you are, you will be notified if intruders open the front door or windows of your house. Type Door and Window Sensor 2 Model MCCGQ02HL Brand Mi Product dimensions 34×32.7×14.5 mm Wireless connection Bluetooth 5.1 BLE Battery type CR2032 (installed) Operating temperature -10°C to 50°C Operating humidity 0%—95% RH, non-condensing Color White Package Contents Mi Door and Window Sensor 2×1 Adhesive sticker x2 User manual x1