This all-black classic matte model is just the thing to celebrate G-SHOCK's 35-year quest for ultimate toughness.The base model is the this year's revival model, the DW-5900.This amazingly versatile neoclassic model is the perfect choice for street fashions, mode fashions, sports, and just about any other style imaginable. Case / bezel material: Resin Resin Band Shock Resistant Mineral Glass 200-meter water resistance Electro-luminescent backlight ,Selectable illumination duration (1.5 seconds or 3 seconds), afterglow World time,29 time zones (48 cities), daylight saving on/off 1/100-second stopwatch, Measuring capacity: 59'59.99'', Measuring modes: Elapsed time, split time, 1st-2nd place times 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) 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, date, day Accuracy: ¶ñ15 seconds per month Approx. battery life: 5 years on CR2025 Size of case : 51.4Ç?46.8Ç?15.5mm Total weight : 60g