Ajax Door Protect Black is a professional-grade wireless door and window sensor designed for indoor security installations. This compact device features a small magnet activation threshold of just 1cm, making it ideal for monitoring entry points with precision. Operating on the 868.0–868.6 MHz frequency band, it delivers reliable wireless connectivity across open spaces up to 1200m under optimal conditions. The pre-installed CR123A battery provides exceptional longevity, powering the sensor for up to 5 years between replacements. Its discreet cylindrical form—20mm diameter and 90mm height—integrates seamlessly into modern interiors without compromising aesthetics. Perfect for residential or commercial security systems requiring dependable perimeter monitoring.
