Why this sensor matters Protect doors and windows around the clock with a simple, reliable device that turns an opening event into an immediate phone alert. Ideal for homeowners, renters, and small offices who want clear, fast information about access to their space. Key benefits Fast, tool setup: Install in minutes. Place the sensor and magnet so they are aligned and less than 10 mm apart for reliable operation. 24/7 monitoring: Continuous, realtime detection watches door and window status so you always know if an opening happens. Immediate mobile alerts: When the sensor is triggered by a door or window opening, your cell phone receives an alarm signal within seconds, giving you time to respond. Ready to use out of the box: Battery is preinstalled at the factory, so the sensor works right away without additional parts. What it does (function and performance) Detects door and window openings and reports status changes in real time. Delivers quick alarm signals to your cell phone when the sensor is triggered, helping you act promptly. Designed for consistent daytoday performance with straightforward alignment requirements (sensor and magnet less than 10 mm apart). Practical attributes Function: Door/window open detection and mobile alarm notification. Power: Selfcontained battery, factory preinstalled for immediate use. Installation: Simple alignmentbased mounting; installation takes only a few minutes. Reliability: Realtime monitoring 24 hours a day, 7 days a week. Use scenarios Home entry monitoring: Place on a front or back door to receive instant alerts if someone opens the door while you're away or asleep. Window security: Install on groundfloor or basement windows to get immediate notice of unexpected openings. Small office or rental property: Monitor access to a workspace or shortterm rental and receive prompt alerts to your phone if a door or window is opened. What you'll get A compact door/window sensor with factoryinstalled battery, designed for quick installation and continuous, realtime monitoring that alerts your phone within seconds when triggered. Installation tip For reliable operation, align the sensor and magnet so they sit directly opposite each other and remain less than 10 mm apart.