Ajax DoorProtect Plus Wireless Door & Window Sensor Black

The Ajax DoorProtect Plus is a wireless door and window sensor that alerts you instantly when entry points are opened, even roof windows left ajar for ventilation. This opening detector uses premium British-made reed switches to reliably sense magnetic field changes, protecting your home from intrusions while the accelerometer catches vibrations, impacts and tilt angles.

Reliable Detection Meets Long Battery Life

• Premium reed switch technology detects opening of doors, windows and roof vents
• Accelerometer registers vibration, impacts and changes in vertical slope angle
• Operates up to 5 years on a single battery—no maintenance needed
• Encrypted wireless transmission with jamming detection and tampering alarm
• Ready to use straight from the box; pairs with your hub in one click via mobile app

Ideal for homeowners and renters seeking affordable perimeter security. Mount it on standard frames, roof windows or integrate third-party detectors via the external contact. Perfect for homes where you need peace of mind without professional installation.