100% Authentic original Casio G-Shock GA100A-9A . G-Shock includes original packaging, manuals, labels and one year warranty with Casio Introducing the Extra Large G, a revolution in case size to keep up with the G-Shock's standard for big case designs.  This Ana-Digi, “three-eyed” monster measure in at a massive 55 x 51.2 x 16.9mm size, with an attention to detail, that is second to none. Large anti-skid buttons which makes it easy to operate and set, embossed indexes gives a 3-D look and a rivet bezel design has always been its forte to its overall appearance. 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 Size of case: 55 X 51.2 X 16.9 mm Total weight: 70 g LED:Umber 1 x GA100A-9A with Original Tag