Smart door and window sensor ZigBee / WiFi

With the smart door opening sensor, you receive instant notifications on your phone as soon as any door or window is opened or closed — even when you are outside the house. Know everything happening in your home. A small device... but it gives you a great sense of security whether for the house, office, or even the children's room. Specifications of the smart door opening sensor: Product name: Wireless smart door sensor ZigBee / WiFi. Wireless connection: WiFi / ZigBee. Supports low battery alarm: Yes. Operating temperature: -10℃~+50℃. Alarm trigger distance: 20±5 mm. Battery specifications: CR2032 (replaceable). Package contents: Door/window sensor *1 + battery *1 + product user manual *1 + double-sided sticker *2. Classification: Sensors. Features of the smart door opening sensor: Instant notification when opening or closing the door Monitor directly from your phone at any time Enhances home security against unexpected entry Works as a smart guard for doors and windows Share alerts with family Low battery alert Easy wireless installation Questions about the smart door or window sensor: Does it work without a gateway? Yes, the WiFi version works directly, while ZigBee requires a gateway. Does it send notifications? Yes, instant alert upon each open or close. Can I know the time of opening? Yes, it displays a full activity log. How long does the battery last? Several months depending on usage, with an alert when low. Can it be shared with family? Yes, easily via the app. You can also shop for: Motion detection sensor Smoke and fire detector