Smart Home Security Sensor：This door sensor alarm 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 Window Sills.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 Window Sills.Alert Message Notification：The smart door and window sensor is compatible with Smart Life App and Tuya Smart App. You will receive an alarm signal from your phone App when the door sensor find your door or window opened. Window Sills No more need to afraid someone enter your home without permission.