Wall-mounted motion sensors can be limited by a room's furniture or other objects, but the 60-Foot Circular Zoom Lens PIR Detector mounts on your ceiling to capture any motion in the room. Mount this motion detector to any ceiling up to 16 feet high and connect it to your security system for immediate, accurate alerts when an intruder is detected in your home. With adjustable pulse count, adjustable sensitivity, and extra-strong RFI protection, the 60-Foot Circular Zoom Lens PIR Detector is well suited for commercial, industrial, and institutional installations. The 60-Foot Circular Zoom Lens PIR Detector uses a high-quality spherical lens to form 276 dense detection zones in a 360 pattern. Thanks to the adjustable zoom feature, these zones provide a 60-foot circular motion detection area at any installation height from 8 feet to 16 feet with absolutely no dead spots. The pattern angle can be variably adjusted. The 60-Foot Circular Zoom Lens PIR Detector's special lens can be adjusted up and down by rotating the housing cover of the zoom mechanism. Additional features include a noise reduction current to ward off outside noise, such as electromagnetic interference and noise from fluorescent lights.