Lorell 60990 Wall Clock, 9 in., Arabic Numerals, White Dial/Black Frame The clock automatically adjusts to Daylight Saving Time and designed to work in the continental United States Design also features an easy-to-read white dial, black Arabic numerals, red 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