Convenient switch and occupancy sensor combo in sleek Decora style unit. Advanced passive infrared technology provides highly accurate monitoring in a variety of commercial applications. The OSSMD and OSSMT Multi-Tech unit combines passive infrared and ultrasonic technologies to provide maximum sensitivity with immunity to false triggering. Dual-Relay Decora Wall Switch, Multi-Technology Occupancy Sensor, 180 Degree, Coverage 2400 Sq. Ft, Black. OSSMD ideal for bi-level offices, partitioned areas and restrooms or areas where minor motion is likely to occur Single-pole and 3-way wiring Exclusive automatic "walk-through" sensing increases energy savings by shutting lights within 2 1/2 minutes after momentary occupancy Manual override turns lights on at any time regardless of override setting PIR can be disabled For more information please visit www.leviton.com