This "smart" wall clock will automatically self-adjust for Daylight Saving Time, eliminating the hassle of taking down and re-setting the clock twice each year! A tiny CPU chip which is programmed with the DST dates for the next 99 years is built into the reliable quartz movement . Once the clock is set, the hands will automatically move forward or backward to adjust for Daylight Saving Time on the correct days each year. Features a large 13 inch mahogany finish wood frame with a polished brass accent trim. Uses one (1) AA battery which is not included.