Electrical Timers - 7-Day Digital 2.3" LCD Programmable Smart Socket Plug Wall Plug-In Timer Switch Energy-Saving Outlet For Lights And Appliances SAVE ENERGY AND MONEY: Infityle Plug-In Timers Saves energy by automatically turning lamps, fans, christmas tree lights and other electrical devices on and off VARIOUS PROGRAMMING SETTINGS. Infityle electric Timers Allows same setting Mon-Fri or 7 days; Same set with Mon-Fri + Sat + Sun; Individual setting. This time switch allows you to set programs for individual days or various combinations of days.The timer can be used to set up to 10 "on/off" group timers per day. ANTI-THEFT FUNCTION: Random switching function and summer mode, featuring DST daylight saving time & RND/random vacation setting.Features a random setting to have your lights to go on and off at random times during your absence SUMMER TIME SWITCH: it can easily switch between Standard time and Summer time(DST); Interchangeable 12-hour/24-hour format BUILD-IN BATTERY: Infityle timer socket with rechargeable battery backup assures you stay on schedule even after a power outage.