Lorell Products - Wall Clock, 12&quot;, Arabic Numerals, White Dial/Silver Frame - Sold as 1 EA - Round profile 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. The clock automatically adjusts to Daylight Saving Time. Design features an easy-to-read white dial, black Arabic numerals, and red second hand sweep. Clock runs on one AA battery (sold separately).