Receive Real-time Alarms Remotely: when a door/window is opened or closed, the sensor will push instant notification to your smartphone immediately. and even can be clear when someone enters your home, shop, office, etc. Programmable Smart Window Sensor: Extend your smart home automation with a WiFi door sensor; Set up your smart routines in the app; Automatically turn on your smart wall switches or lights when the door opened; Automatically turn off you're air-conditioning when the window opened; More smart devices can be sync as long as they are compatible with Smart Life app. Newly Upgraded Tuya Door Sensor: Newly upgraded version is Bluetooth + Wifi dual connecting mode, do upgrade for help faster and better paring device to the App, No hub required; No extra cost; Simple setup! Wifi garage sensor is compatible with Amazon Alexa and Google Assistant. Easy Installation: No Need to use complicated tools when installation, just use 3M glue to install, firm and durable. Wifi door window sensors can be installed on the front door, window, baby room, garage doors, skylights, safes, etc. Low Power Warning: The sensor door needs 2*AAA Alkaline battery ( included). When the battery level is low, it will automatically push messages through APP to remind you to change the battery, and never worry about running out of battery. We provide 24 monthly warranty, please buy with confidence.