Lorell Wall Clock with Arabic Numerals, 13-1/2-Inch, White Dial/Mahogany The clock automatically adjusts to Daylight Saving Time and designed to work in the continental United States Design also features a wood tone frame, easy-to-read white dial, black Arabic numerals, black second hand sweep and ABS plastic cover Round wall clock is radio-controlled so the setting is modified each day to that of the atomic clock, accurate to one second per million years