An outstanding watch even among the G-Shocks, it’s highly durable and very useful to use for beginners. Got all the basic functions (including alarm, timer, and a stopwatch) to support pro-level sports and this model’s LCD background show readings in their clearest form. Its cosmetic appeal is irresistible to tech watch collectors; it’s the kind of black you see in shiny, new grand piano cases. Features: Case/bezel material Resin Resin Band 200-meter water resistance Mineral Glass Shock Resistant Electro-luminescent backlight Afterglow Flash alert Flashes with buzzer that sounds for alarm, hourly time signal, countdown timer time up alarm 1/100-second stopwatch Measuring capacity 00'00"00~59'59"99 (for the first 60 minutes) 100'00~2359'59 (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 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 Multi-function alarm Hourly time signal Full auto-calendar (to the year 2039) 12/24-hour format Regular timekeeping Hour, minute, second, pm, month, date, day Accuracy +/-15 seconds per month Approx. battery life 2 years on CR2016 Size of case/total weight 53.2 X 50 X 16.3 mm/67 g ELBlue Green