Mengshen 4 Pack Smart WiFi Door Window Sensor Wireless Contact Sensor Alarm

Price: $28.99
(as of Oct 16, 2026 07:52:52 UTC – Details)

Product description

Instant Notification

Push instant notification to your phone immediately when door or window is opened or closed. Keeping you informed all the time.

Alert and Recording

Whenever the sensor is triggered, it will send alarm to alert you that someone opens your door or window. Support checking open / close records on the app. Never worry about missing any important moments.

Low Battery Remind

When battery level is low, it will automatically remind you to change batteries, never worry about running out of battery.

Compatible with Alexa and Google Home. Seamlessly integrate your smart home system with Alexa and Google Home for hands-free voice control, enhancing your daily convenience.

Open the back cover

Install 2*AAA battery(not included)

Installed with double-sided adhesive tape or screws(included)

Download an app “tuya” or “Smart Life” from Google Play or App Store to add the device to detect the status of your door/window.

Material ABS Sensor Size 25*70mm/1*2.8inch Magnet Size 12*43 mm/0.5*1.7inch Power Supply 2*AAA battery(not include) Wireless Type 2.4GHz WiFi App Smart Life / Tuya Package Content Sensor, Magnet, Ejector, Tape, Manual

Wide Application

Windows

Doors

Pet Door

Drawers

Universal Smart Door Window Sensor: No hub required. Only a 2.4GHz WiFi connection (not compatible with 5G). Simply download the ‘Tuya’ or ‘Smart Life’ App to connect it. Stay informed about the safety of your home no matter where you are
Never Miss an Alert: Instant smartphone notifications when openings exceed 15mm – monitor your property 24/7 from anywhere. The software will record each data, specific to the duration of door opening and closing
Easy to Installation: Simply use the included adhesive paper for quick, secure attachment-ensure the surface is clean and dry for optimal adhesion. Install anywhere: doors, windows, drawers, filing cabinets or safes in homes, offices, hotels, warehouses
Smart Battery Management: Powered by 2 AAA battery (Not included). Get proactive low-battery notification on your phone when the battery is running out
Expandable Security System: Seamlessly connects with Tuya, Smart Life, Alexa and Google Home ecosystems – control with voice commands or automate your security routines. Alexa and Google can answer your question ‘Is the door open or closed?’ Pair with other Tuya devices like sirens and floodlights to trigger 100dB alarms when intrusions occur
Compact Design and Durable Construction: Made from ABS material with main body measuring 25x70mm and magnetic strip measuring 12x43mm, providing reliable performance with up to 100,000 trigger cycles on a single battery set