【Smart Home Security Sensor】This door sensor is an excellent security addition to any contact structure: front door, window, baby room, garage doors, skylights, safes, etc. Watching the security barrier at the top of the stairs. All the statuses of doors and windows will be displayed simultaneously in the app. No hub required. 2 AAA Batteries no included.【Programmable Smart Sensor】 Extend your smart home automation with WiFi door sensor door sensor; Set up your smart routines in app; Automatically turn on your smart wall switches or lights when door opened; Automatically turn off your air-condition when window opened; More smart devices can be sync as long as they compatible with Smart Life app.[Alarm Information Notification] The smart door and window sensor is compatible with the Smart Life App and Tuya Smart App. When the door sensor detects that your door or window is open, you will receive an alarm signal from the mobile application (without making an alarm sound) and no longer have to worry about someone entering your home without permission. Tuya/Smart Life app has added SMS and phone notifications, but additional fees are required. You can choose according to your own needs, and if not needed, there is no need to pay.【APP Remote Monitor & Voice Control】Under 2.4G WiFi, The wifi door sensor can be controlled by SMART LIFE App or TUYA App which can be downloaded by scanning the QR code on the user manual. By connecting the smart sensor with Alexa or Google assistant to realized voice control. Come to make your smart home life more convenient and easier.【Easy To Install】The package comes with 2 pieces of 3M glue. Just tear off the protect paper and stick it on the back of door sensor. Then stick door sensor on the proper position. No need complicated tools and steps to install the window sensor. Note: The notch side should towards each other. We also include screws for your choice for a more secure mounting.