Westek's 1-Outlet Digital Timer turns lamps or appliances On/Off as programmed with 7 programs per week. It can program times across various groups of days (i.e. weekdays, weekends, or individual days). Offering a random function for added security when you are away from home. The built-in rechargeable backup battery saves programmed information during power failures. The easy to read LCD display makes precision timing a breeze.