Woolley Zigbee Door Window Sensor Open Closed Detectors Wirele Mini Sensor Home Alarm Notification Support Google Home Alexa Zigbee Hub eWeLink App Woolley Zigbee Door/Window sensor has MINI body but enough to protect your home safety. When the door/window is opened or closed, immediately push the instant notification to your phone. No matter where you are, you will be notified as soon as someone enters your home, store, office, etc.Even if you are far away from your home, you can still monitor and check the opening and closing status of doors and windows 24 hours a day. It supports checking the on/off records in the application, and can save the history records for up to 3 months. Never worry about miing any important moments.When the battery is low, it will automatically remind you to replace the battery in advance, never worry about the battery suddenly running out.You can also ask about the opening and closing status of doors and windows through Alexa or Google Home voice aistant, just say it.Easy installation with double-sided tape, just stick it to any location you like to protect the house. Smart link with other smart devices to achieve a comprehensive smart concept. Note:The zigbee sensor must be used with zigbee gateway. Package Included 1*Zigbee Door/Window Sensor (contains battery) 1*Manual 1*3M Adhesive Smart Linkage with Camera Used with your smart camera, when the sensor detects the door opened, it will push a notification immediately to your mobile phone, so that you can check the reall-time status of your door. Check Real-time Status via Alexa Low-battery Notification When the battery is about 10%, you will get a notification from the app push. History Record Check is Available for 3-month If you wanna check the past meage notifications of your door-window state, you can find them in the app. Simple Installation No drilling is required, only by double sided adhesive tape.