The TOPgREENER TgT01HN digital astronomic timer switch is an inwall programmable light switch with automatic dusk and dawn adjustments This light switch timer combines the features of a 7day programmable switch with astronomic settings to allow users to fully automate their lights, fans, and more The astronomic feature automatically adjusts dusk and dawn times based on geographic location and the time of year, allowing users to automate their lights based on the sunset and sunrise Simply select your time and zone and the TgT01 will do the rest The timer switch also includes an auto daylight savings time feature to ensure that scheduled programs automatically adjust for time changes throughout the year In addition to 7day programmable settings, this astronomic timer switch includes a Arandom modeA for added security when you are away from home Random mode varies the programmed schedules by a few minutes to make the home appear occupied and deter potential intruders Programmed schedules can always be overridden with the switchAs manual ONOFF button This allows users to keep the load ONOFF indefinitely or set a onetime countdown timer The digital timer switch features a bright, backlit LcD screen for easy programming and an internal memory that backs up saved settings in the event of a power outage This switch is compatible in either singlepole or 3way applications and a neutral wire is required for installation The astronomic digital inwall timer is perfect for any area of the home that could benefit from timed lighting or fan control, such as a dining room ceiling fan, patio lighting, childAs bedroom, or living room lighting for the whole family This timer switch features an white color and it ensures that lights and fans are only on when needed, conserving energy and lowering electricity bills as a result With this convenient wall switch you truly can just set it and forget it This product is UL listed and includes a oneyear warranty