The Hubbell WS277W one button wall switch uses passive infrared technology. The sensor ha a max sensing range of 900sqft and is voltage rated as 277VAC. Features a manual adjustment time delay between 30 seconds to 30 minutes. Comes in a white finish. Hubbell Incorporated, with a history dating back to 1888, began a series of acquisitions of prominent lighting businesses in 1963 that ultimately constituted Hubbell Lighting, Inc. In 2002, Hubbell acquired Lighting Corporation of America in one of the largest acquisitions in the history of the lighting industry, transforming Hubbell Lighting into one of the largest lighting manufacturers in North America.