Wireless outdoor motion detector designed to secure outdoor areas and building perimeters. It uses dual PIR sensors with intelligent algorithms to minimize false alarms and detects motion up to 15 m with a 90° detection angle. The detector connects to the Ajax system via the secure Jeweller protocol with a communication range up to 1700 m, includes anti-masking and tamper protection, and ignores animals up to 80 cm tall when properly configured. Weather-resistant housing and long-life batteries provide operation for up to 5 years.