24-hour dial with hours (13-24) in red on inner diameter for military time at a glance. Minute track for precise reading. Energy-efficient design gets the most out of every battery, saving you time and money. Crystal clear high-quality flat glass face. 1 AA battery (sold separately). Time Format: Military; Standard; Power Source(s): 1 AA battery (sold separately); Movement Type: Quartz; Overall Diameter: 12 5/8″.