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The Ottoclick 3-Knob Microwave Motion Sensor is a compact, ceiling-mounted sensor designed to automate lighting based on occupancy. Using advanced 5.8GHz microwave radar technology, it offers precise motion detection with a full 360° coverage area. Lights turn on automatically when motion is detected and switch off after a preset delay, helping reduce electricity usage and prevent energy wastage.This sensor is equipped with three adjustable knobs for fine-tuning:1. Time Delay: Set from 10 seconds to 15 minutes2. Light Sensitivity: Adjustable from 10 to 2000 Lux3. Detection Sensitivity: Coverage range customizable based on room size and needIt’s ideal for use in hallways, staircases, bathrooms, closets, utility rooms, and other indoor spaces where lights need to respond to human presence without manual switches.