Here s an indoor digital timer that isn t affected by temporary power outages or limited to set times of day! The PRIME 2-Outlet Extra-Heavy-Duty 7-Day Digital Indoor Timer not only has 16 customizable on/off settings and 7 days worth of programming but it also has a random mode that arbitrarily turns things on and off multiple times a day. A battery backup maintains timer settings during power outages. And don t worry about resetting things when dealing with Daylight Saving Time. A simple button push adjusts time of day by 1 hour. This digital timer is designed to work with 3-prong indoor devices. As the outlets are positioned perpendicular to the wall this timer accepts most low-profile and right-angled plugs as well as transformer plugs.