U.S. Polo Assn. Sport Men's US9230 Blue Silicone Digital Watch Quality quartz movement Case diameter: 48 mm Buckle closure Alarm, chronograph, EL backlight, 12/24 hour format selectable Easy-to-read digital display Quality quartz movement Case diameter: 48 mm Buckle closure Alarm, chronograph, EL backlight, 12/24 hour format selectable Easy-to-read digital display