Casio G-Shock Ana-Digi men's wristwatch black GA-2100-1A1er Backproof retro-style watch with digital and analog time display, battery-operated quartz plant, automatic calendar with date, month and weekday, 12-/24-hour format, world time function, stop function up to 24 hours in 1/100 seconds, countdown timer up to 24 hours In 1/1 seconds, 5 daily alarms, button tones on/off, hand moving function, black dial with sublime indexes, super illuminator LED lighting, black luminescent pointers and markings, black carbon diverse resing houses, flat mineral glass, black accordion resin band , waterproof up to 20 bar, size 48.5 x 45.4 x 11.8 mm.