The DT122K heavy duty indoor 7-day digital plug-in timer can be used for 24-hour or 7-day programming. It allows for up to 7 on/off programmed events. This timer utilizes an astronomic feature to keep track of daily sunrise/sunset changes and automatic daylight saving time adjustment. The random feature will vary the time your lights turn ON by a few minutes to give your home a "lived in" look. It has two grounded receptacles. Includes a built-in rechargeable lithium ion battery with a minimum 7-day life to retain date and time. Programs will not be lost in the event of a power failure. This plug-in timer is suitable for use with indoor christmas tree lights or seasonal decorations that require an on/off schedule. UL listed. 15A, 125VAC, 60Hz. PROGRAMMABLE DIGITAL TIMER - Set up to 7 on/off program settings for daily (24 hour) or weekly (7 day) schedules with this heavy-duty indoor digital plug-in timer. VERSATILE OUTLET CONTROL - Featuring two grounded outlets, this timer can control LED and CFL lights, as well as other 15 Amp loads, providing flexibility for various devices. OPTIONAL RANDOM SETTING - Enhance security with the optional random setting, turning items on/off up to 15 minutes before or after the programmed time, creating a more 'lived-in' appearance. ASTRONOMIC FEATURE - The astronomic feature automatically adjusts to sunrise/sunset times throughout the year, optimizing energy usage and enhancing convenience. AUTOMATIC DAYLIGHT SAVING TIME ADJUSTMENT - This plug-in outlet timer includes an automatic Daylight Saving Time adjustment, eliminating the need for manual re-programming twice a year.