Adesso Infinity Small Wall Clock, Steel/Glass Battery-operated mountable wall clock has a simple, versatile design great for any decor Steel frame; glass cover; 2nd layer of glass behind black hands and a round steel center Quartz movement; hangs from a keyhole in the battery casing behind the steel center Uses 1 AA battery, not included; 3, 6, 9, 12 hours marked with Arabic numerals Measures 12 inches in diameter; 2 inches thick; 5-inch diameter steel center