Designed with a slimmer and more compact design this G-SHOCK model GMAS2100RB-1A is the midsize version of the iconic GMA-S2100 with the octagon bezel. The black and deep red colour scheme, with a glossy metallic finish gives the watch a touch of sophistication. - 46.2×42.9×11.2mm Case Size - Carbon/Resin Case and Bezel - Resin Band - Carbon Core Guard Structure - Shock Resistant - Mineral Glass - 200 Meters Water Resistant - LED: White, double LED light - World time - 31 time zones (48 cities + coordinated universal time daylight saving on/off) - Stopwatch - Timer - Alarms: 5 daily alarms - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - 12/24-hour format - Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents. - Regular timekeeping - Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) - Digital: Hour, minute, second, pm, month, date, day - Accuracy: ±15 seconds per month - Approx. battery life: 3 years on SR726W x 2