Large face makes this clock easy to read from a distance. Clean text style provides an elegant simplicity. Designed to get the most out of every battery. Quartz movement helps ensure accuracy. Crystal clear convey plastic face is shatter resistant. 1 AA battery (sold separately). Time Format: Analog; Power Source(s): 1 AA battery (sold separately); Movement Type: Fuda Brand Quartz Movement; Overall Diameter: 13 1/2″.