From super-tough G-SHOCK comes a new drop of the GM2100M-1A Watch that features a bio-based bezel, mineral glass face, and is shock resistant for extra durability. What more could you want? Cop yours today! - Mineral Glass - Bio-based resin band - Shock Resistant - 200-meter water resistance - Case / bezel material: Resin / Stainless steel - LED backlight (Super Illuminator) - Measuring unit: 1/100 second (for the first 60 minutes) - 12/24-hour format - Regular timekeeping - Full auto-calendar (to year 2099) - Countdown timer - Approx. battery life: 3 years on SR726W X 2 - Size of case: 49.3 × 44.4 × 11.8 mm - Total weight: 71 g - Colour: Silver/Black - Style: GM2100M-1A