Door Alarm Sensor 2 Pack 125dB Mini Door Window Open Alarm Sensor White #CN/251024/15501 Key benefits Immediate audible alert: 125dB alarm sounds when a door or window is opened, providing a clear warning of unauthorized or unexpected entry. Simple coverage for multiple points: Two compact sensors let you protect two doors or windows right out of the box. Lowprofile design: Mini white housings blend with most door and window frames for a discreet installation. Easy installation and use: Surfacemount style fits most door and window types and triggers automatically when the magnet and sensor separate. What this product does Magnetic contact alarm that detects separation between the sensor and its matching magnet. When contact is broken by opening a door or window, the device emits a 125dB alert to draw attention instantly. Important attributes Pack: 2 sensors per package. Alert level: 125dB audible alarm. Color: White. Model: CN/251024/15501. Size: Mini, lowprofile form factor suitable for tight spaces. Housing: Compact plastic construction designed for discreet placement. Compatibility: Works with most swinging doors, sliding doors, windows, cabinets, and similar openings where a magnet and sensor can be aligned. Practical applications Front or back entry doors: Add an audible alert to know when someone opens a main door while you are away or in another room. Sliding glass doors and groundfloor windows: Provide a loud notification to deter intrusion or accidental openings at night. Garages, storage rooms, cabinets: Monitor seldomused access points or restricted storage areas with a simple, visible alert. Installation and use tips Mount the sensor on the frame and the magnet on the moving part so that the two components are aligned when closed. Place sensors where they remain out of the way but still allow the magnet and sensor to separate cleanly when the opening moves. Two sensors per pack lets you cover adjacent doors or keep a spare for an additional location. Package contents Two mini door window open alarm sensors. Model number CN/251024/15501. This 2 pack provides a compact, audible solution for notifying you when doors or windows are opened, suitable for homes, rentals, offices, and small storage areas.