Batten down the hatches! Keep your doors, windows, and cookie cupboard safe and secure! The Sonoff Wi-Fi Door/Window Sensor is a low cost solution for monitoring your doors and windows within a smart home setup. Use it to easily check that you haven't left a downstairs window open at night or to automatically turn on the bathroom light when you open the door. It's powered by 2xAAA batteries (not included). Installation couldn't be simpler, just use the included 3M adhesive tape to fix the sensor and magnet modules to the door/window and the frame. Security and savings If you live in household where the kids forget to close the garage door after a bike ride or your partner leaves windows open while the central heating struggles to keep up then these handy little sensors are just what you need! Within your home automation setup you can create rules for what happens when a door or window is opened or closed or if it is left open for a specific period of time. These rules can trigger notifications or events such as turning a light on or off. You can also easily, at a glance check the state of all of your monitored doors and windows. You don't need to use a hub with this sensor as everything's controlled from Sonoff's eWeLink smartphone app. Why we love it Install In Any Corner of Your Home: No more second-guessing if things are locked or secure—it works seamlessly on doors, windows, drawers, garage doors, blinds, and more. Battery Alert: When the battery is low, you will receive a notification on the app to avoid missing security alarms due to a low battery. No Gateway Required: Easily pair the sensor to the eWeLink app, then control it remotely through Wi-Fi—no additional gateway needed. Real-Time Sync & Camera Linkage: Monitor the sensor's real-time status in the app. You can also bind a camera to visually confirm any activity. Quick & Easy Setup: Installation is a breeze with the included 3M adhesive—stick it up in seconds, no tools required! Smart, simple, and secure – doors and windows just got a whole lot brighter! 🚪✨ Tech specs Battery: 2xAAA (not included) Working Voltage: DC3V (2 x 1.5V battery) Quiescent current: ≤ 40 μA Wi-Fi: IEEE 802.11 b 2.4GHz Installation gap:
