Apart of the ‘Black & Rust Colour’ collection, GA2100RC-1A is an example of the level of toughness the G-SHOCK watches can withstand. In demonstration of the colour of aged metal over time. - 48.5 × 45.4 × 11.8mm Case Size - 51g Weight - Carbon/Resin Case and Bezel - Resin Band - Shock Resistant - Carbon Core Guard structure - 200 Meters Water Resistant - Approx. battery life: 3 years on SR726W X 2 - Mineral Glass - World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off - Stopwatch - Timer - Alarm/hourly time signal - Double LED light - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Accuracy: ±15 seconds per month Other features - 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