Lutron LRF2-OCR2B-P-WH Radio Powr Savr Wireless Ceiling-Mounted Occupancy/Vacancy Sensor， White<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Automatically turns light off based on room's occupancy</li><li>No external power packs， power wiring， or communication wiring necessary</li><li>Has a radio frequency (RF) range of up to 60ft between sensor and compatible Lutron RF controls like Maestro Wireless (MRF2-) dimmers and switches</li><li>10 year battery life</li><li>360° field of view， 400 sq. ft. range at 9 ft. ceiling height</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31HTqoODYZL.jpg" noproxy>