Meet the G-Shock GM2100B-3A Green Metal Covered 'CasiOak', a rugged timepiece that marries style with durability. Its compact 49.3 × 44.4 × 11.8mm case and 72g weight make it both resilient and comfortable for everyday wear. Crafted with a robust combination of resin and stainless steel for the case and bezel, paired with a reliable resin band, it's designed to withstand shocks and maintain its integrity in any environment. With a water resistance of 200 meters and a battery life of approximately 3 years on SR726W X 2 batteries, it's prepared for any adventure. Featuring mineral glass and an array of functions including world time, stopwatch, timer, and alarms, it ensures you're always on schedule. The double LED light system guarantees clear visibility in any lighting condition, while the full auto-calendar keeps you organized up to the year 2099. Complete with a mute feature for button operation tone control and a hand shift feature for unobstructed viewing, the GM2100B-3A is the perfect blend of toughness and functionality. - 49.3 × 44.4 × 11.8mm Case Size - 72g Weight - Resin/Stainless steel Case and Bezel - Resin Band - Shock Resistant - 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 - 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