Smart Alerts Notice. Get instant push notifications to your phone when the door sensor detects activity. Family members can share one sensor. Share the device with your family using the Smart Life app. Lighting automation: Create smart scenes on the Smart Life app; your smart light can turn on automatically when you open the door. Easy to install: Align with the middle line, gap less than 10 mm. Low power technology: Equipped with a high-performance, low-power microprocessor, the battery lasts up to 2 years, reducing the need for frequent battery replacements. Push message: When the status of the door and window sensors changes, the mobile app receives messages in real time to help address unusual situations. Compact size, easy to install: Adhesive installation allows flexible placement on doors, windows, drawers, etc., without affecting the appearance or structure of existing furniture. Input voltage: AAA 1.5V x 2 (batteries not included) Quiescent current: 8uA Alarm current: 70-120mA Low power undervoltage: 2.7V WiFi: 2.4GHz IEEE 802.11b/g Magnetic control distance: 10mm Operating temperature: -10C to 50C Operating humidity: max 95% RH Color: white Material: ABS Size: 70 x 25 x 20mm Package Contents: 1 x Smart Window Door Sensor Note: The package includes only the items listed above. Other products are not included. Note: Lighting and different displays may cause slight color differences between the image and the actual item. Measurement error allowed is +/- 1-3cm.