Street-smart and nature-minded — a fashionable G-SHOCK dressed in all black. The monochromatic design with a matte finish makes for a simple, yet bold design. Key resin components of the bezel and band are made with bio-based resin. Produced using renewable organic resources, this material is expected to help reduce environmental impact. Details Case Size(L x W x H): 45.7 × 40.5 × 11.9 mm Weight: 42g Case and Bezel Material: Resin / Bio-based resin Band: Bio-based resin band Construction: Shock Resistant Water Resistance: 200-meter water resistance Power Supply and Battery Life: Approx. battery life: 3 years on CR1616 Exterior Glass: Mineral Glass Compatible Band Size: 145 to 190 mm Watch Features Stopwatch: 1/100-second stopwatch, Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes), Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes), Measuring modes: Elapsed time, split time, 1st-2nd place times Timer: Countdown timer, Measuring unit: 1 second, Countdown range: 24 hours, Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments), Other: Auto-repeat Alarm/Hourly Time Signal: Multi-function alarm, Hourly time signal Flash Alert Feature: Flash Alert, Flashes with buzzer that sounds for alarms, hourly time signals, countdown timer time up alarm Light: LED backlight (Super Illuminator), Afterglow Light Colour: LED: White Calendar: Full auto-calendar (to year 2099) Accuracy: Accuracy: ±15 seconds per month Other Features: 12/24-hour format, Regular timekeeping: Hour, minute, second, pm, month, date, day