About the Leviton OSC10U0W Ultrasonic Ceiling Mounted Occupancy Sensor, 1000 Sq. Feet CoverageWhite.The Leviton OSC20U0W is an occupancy sensor that operates with low voltage requirements and is used to light indoor rooms, covering 1000 sq. feet by producing continuous high frequency(ultrasonic) sound waves. The sound waves are practically imperceptible to the ear due to the high speed action of the sound waves in motion. This sensor is very easy to install due to its easy ceiling mount and a twistlock sensor attachment. There is maximum reliability as you can be rest assured that all the digital circuitry are low cost and use a minimum number of components. Whether the application is for the cafeteria or a workout facility,the Ultrasonic Ceiling Mounted Occupancy Sensor will provide maximum detection at an affordable price.The Leviton OSC20U0W is selfadjusting and has a sensor technology that emits an ultrasonic pulse that reaches up to 40kHz; that is 20kHz past the upper range of human hearing. Its nonvolatile memory allows it to protect its stored settings even when there is a power outtage.Leviton was founded at the turn of the 20th century. For the past century, Leviton has become North America's leading manufacturer of electrical wiring devices through enhanced communication and electrical safety.Additional Information:Dimensional Drawing (PDF)Instruction Sheet (PDF)Product Spec Bulletin (PDF)