Casio - G-Shock - Gold Collection - Dark Gold - DW6900GD-9 Imported Shock Resistant, 200 Meter Water Resistant, EL Backlight with Afterglow, Multi-function Alarm Hourly Time Signal, Flash Alert, 1/100 Second Stopwatch, Countdown Timer Full auto-calendar (pre-programmed until the year 2099), 12/24 Hour Formats Accuracy: +/- 15 seconds per month, Battery: CR2016, Approx. battery life: 2 years Module 3230, Size of case/total weight: 53.2 x 50.0 x 16.3mm / 67g