Enover 7 Day / 24 Hour Programmable Digital Weekly Light Switch Timer Plug for Electrical Outlet with Anti-theft Random Option, 15A/1800W Flexible Scheduling: up to 10 different ON/OFF programs in a 7-day period; every program you set repeats once each week Energy Saving: automatically turns on and off lamps, Christmas lights, humidifiers and other electrical devices, and protects your phone from overcharge Useful Security Precaution: features a random option for lights to go on and off at varying times while youre away from home and helps to mystify burglars Easy to Operate: comes with a large LCD display and a convenient manual override switch that allows you to skip the programs if your schedule changes Battery Backup: with the built-in battery backup, the unit retains the programming even in a power outage and saves you the trouble of having to reprogram