Utilizes ultra-reliable Universal Powerline Bus (UPB) technology; No new wiring needed; For new or existing lighting fixtures, lamps, fans and other electrical devices * Powerful expansion capability - up to 250 devices using UPStart software, your PC and Computer Interface Module Random "vacation mode" setting. Built-in celestial clock computes sunrise and sunset. Calculates daylight savings time. * Can transmit and receive scenes with other Simply Automated dimmers, plug-in modules, wall receptacle, fixture modules and other UPB devices - can control virtually any UPB device that connects to AC power wiring anywhere in the home * Your home should be no more than 2500 square feet and have only one breaker panel; A phase coupler is required in some home installations * Scheduler-Timer. Automatic on/off scheduling for all Simply Automated dimmers, lamp/appliance/fixture modules and wall receptacle. Designed for ease of use. No computer programming required.