Casio - White Mirror-Metallic G-Shock watch - DW6900NB-7 , Shock Resistant, 200 Meter Water Resistant, EL Backlight with Afterglow, Multi-function Alarm, Hourly Time Signal, 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) 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, 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, Full auto-calendar (pre-programmed until the year 2039) 12/24 Hour Formats, Accuracy: +/- 15 seconds per month, Battery: CR2016 Approx. battery life: 2 years, Module 128, Size of case/total weight, DW6900NB 53.2 x 50.0 x 16.3mm / 67g