The Wireless Door/Window Sensor can be placed on your door or window to notify you through an alert notification if your door or window is open or closed, adding an extra layer of security to your home. The opening and closing status of the door/window is synced to your mobile phone, so you no longer have to worry about whether the door/window is off or not ZigBee Bridge is required. The sensor gives you the ability to create a scene link between ZigBee and Wi-Fi devices. This sensor is able to help you create a smart home. Working in harmony with the ZigBee Bridge, you can stage a stage so your hallway is lit up as soon as the door opens Simple installation for easier installation, installation of 3M adhesive (included) saves you a lot of time. Its application can also extend to wide areas such as drawers, garage doors, blinds, etc. Just stick it to a place where two things are connected and it's still safe, even if you don't monitor it Share the sensor with your family to give them the ability to quickly control and monitor your home together. 3 months history check