The Accuwave II Wall Clock features an easy-to-read white dial with black Arabic numerals, a black case, and a glass crystal. The ultimate in accuracy, this Howard Miller Accuwave DS wall clock automatically sets itself, and adjusts for Daylight Savings Time. This clock receives a radio signal from the cesium atomic clock, the most accurate clock in the world. Includes radio controlled battery movement. Requires 1 AA battery (not included). Dimensions: 1 3/4"D x 12 1/4"Diameter. Made by Howard Miller.