Leviton OSSMT-GDG Ultrasonic/Infrared, Multi-Technology Wall Switch Sensor, No Neutral, 2400 sq. ft. Major & 400 sq. ft. Minor Motion Coverage, Gray Self-Adaptive Technology: Callbacks for adjustment are eliminated, time delay and sensitivity settings are continually adjusted to occupant patterns of use in auto adapt mode Convenient push-button provides manual ON/OFF light switch at any time Exclusive automatic "walk-through" sensing increases energy savings by shutting lights within 2 1/2 minutes after momentary occupancy OSSMT is ideal for private and Executive offices, conference rooms, storage areas, restrooms, classrooms, lounges, and training areas, or areas where minor motion is likely to occur Fast, simple installation: fits in a standard wall box and replaces a single-pole wall-switch