The AcuRite 13.5-inch jumbo wall clock is suitable for any home, office, or garage. The extra-large LCD screen features bold, easy-to-read numbers that display the current hour, minute, and second. The Intelli-Time technology is preprogrammed to automatically update itself for daylight saving time. This indoor wall clock doesn’t require charging and is free to be placed anywhere thanks to power from four (4) AA batteries (not included).The clock comes with a one-year limited warranty. Intelli-Time Clock large digital screen 13.5″ x 6.3″ Intelli-Time clock and calendar are pre-programmed to the correct time and date, and update automatically for Daylight Saving Time. All you need to do is select your time zone using the TIME ZONE button.Hassle-Free Intelli-Time Technology: Automatically adjusts the time for daylight saving time Bold, Extra-Large 4″ Digits: Allows you to view the time clearly from across the living room, office, or classroom Free to Place Anywhere: Integrated hang hole on back or foldout kickstand for easy placement Battery Powered: No need for a power cord or need to reset if there?s a power outage; requires four (4) AA batteries (not included).