The Aube timer switch can be used to schedule lighting events, controlling incandescent, halogen and fluorescent lights. Programmable on/off times or can turn lights on at sunset and off at sunrise based on latitude and longitude coordinates. Can be used in single pole or 3 way installations. Can operate in manual, automatic and random modes for when you're away from home. Back-lit display and confirmation LED indicating load status. -Automatic daylight savings - no need to reprogram -Neutral wire required. In good used condition.