G-Shock GA-100MB Classic X-Large Digital Matte Black Green

G-Shock is dedicated to the ongoing pursuit of further advancement of the Classic G-Shock watch, considering every possible option to improve upon the product. G-Shock Classic Watches are a reflection of this pursuit in its purest sense. Their designs reflect a deeper meaning than the usual superficial styling. These are smart designs born form the pursuit of pure functionality. G-Shock is the ultimate tough watch. It was born from a developer's dream of "creating a watch that never breaks." Guided by a "Triple 10" development concept, the design teams sought a watch with 10-meter free-fall endurance, 10-bar water resistance and a 10-year battery life. At a time when it was commonly believed that watches were breakable items, G-Shock's development represented a challenge to common sense. The number of experimental prototypes built for endurance testing reached over 200. And the structural development and parts improvement took approximately two years. After a long, hard process of trial and error, G-Shock was finally launched. A shock resistant structure that overturned conventional thinking about watches was realized thorough breakthrough thinking, including the ideas of a hollow- structured case, all-directional protective covering and the use of cushioning material to protect critical parts. These were the fruits of technological development that insisted on "toughness" and a revolution in watch design. Since its launched, G-Shock has continued to evolve for 25 long years, carrying on the toughness of spirit and uncompromising passion that led its developers to persist in their unshakable belief. G-Shock is dedicated to the ongoing pursuit of further advancement of the Classic watch, considering every possible option to improve upon the product. They are a reflection of this pursuit in its purest sense. Their designs reflect a deeper meaning than the usual superficial styling. These are smart designs born form the pursuit of pure functionality. Button guard that protects the module from direct shocks Our case shapes are designed in such a way to make sure that the buttons are never struck directly if the watch is dropped, no matter what the angle. Intelligent Timing GShock watches employ intelligent, LSI-based electronic technologies to achieve unsurpassed precision and to provide a wide range of features and functions which no conventional mechanical watch can match. SPECIFICATIONS Size of case: 55 X 51.2 X 16.9 mm Mineral Glass Magnetic Resistant Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band LED light Auto light switch, selectable illumination duration, afterglow World time 29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city / World time city swapping 1/1000-second stopwatch Measuring capacity: 99:59'59.999'' Measuring modes: Elapsed time, lap time, split time Others: Speed (0 to 1998 units / hour), Distance input (0.0 to 99.9) Mach indicator (speed exceeding 1225 units / hour) Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Other: Auto-repeat 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Regular timekeeping Analog: 2 hands (hour, minute (hand moves every 20 seconds)) Digital: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 2 years on CR1220 Total weight: 70 g LED:Umber