SONOFF DW2 WiFi Door Window Sensor, Mini Wireless Alarm System, Smart Monitoring Device for Home Security, Works with Alexa and Google Home, 2.4 GHz Only, No Hub Required

[ Phone Alerts ] Receive real-time notifications on your phone for door/window status changes from the eWeLink App- no hub required. (NOTE: No built-in siren, but alert your phone.) [ Low Battery Alerts ] Real-time battery level monitoring and low battery alerts via the eWeLink app prevent 'insecure time' due to 'low battery'. [ 30-Second No-Tools Installation ] Easily stick, and secure on doors, windows, cabinets, or garage surfaces without drilling or wall damage ( removable for hassle-free adjustments). [ Work with Alexa & Google Home ] You can integrate the sensor with Alexa and Google Home ( paired to the eWeLink App at first) for door status checks through voice. [ Voice Alarm& Smart Scene ] Connect this door sensor to the SONOFF hub/camera with a built-in siren for instant alarms – when triggered, the hub/camera sounds an alert to secure your home. It can also trigger the SONOFF camera to record or the SONOFF light switches to turn on., Weight: 0.0661386786 Pounds, Manufacturer: SONOFF