The Wireless Photoelectric Motion Detector is perfect for monitoring the perimeter of large areas, including yards, driveways, indoor shopping areas and more. No trenching is required, drastically reducing installation costs. The Motion Detector is compatible with most manufacturers wireless systems and comes wireless ready with a multi functional back box. The Motion Detector features an environmental compensation circuit designed to eliminate false alarms caused by snow, fog, heavy rain, ice and misalignment. The beam interruption adjustment function also allows you to select the suitable beam interruption time for any environment. Additionally, crosstalk is eliminated with four, channel selectable beam frequencies for use when stacking beams or for long range applications. FEATURES: Low battery output and LED. Wall or pole mounted. Four channel selectable for stacking applications. Inovonics EchoStream wireless transmitter and batteries installed. CONTENTS: Motion Detector, Pole Mounting Bracket Set, Mounting Plate Lock Screws, U Brackets, Hook and Loop Fastener Tape.