G-Shock Whiteout Series GD100WW-7 watch by Casio. Shock resistant. 200m water resistant. Auto LED backlight (Super Illuminator). Multi-time (4 different cities). World Time: 31 time zones (48 cities + UTC), city code display, daylight saving on/off. 5 independent alarms (one-time or daily). Hourly time signal. Flasher with buzzer that sounds for alarms, hourly time signal, countdown timer time-up alarm, countdown timer progress beeper. 1/100 second stopwatch. Measuring modes: Elapsed time, split time, 1st-2nd place times. Countdown timer (Measuring unit: 1/10 second, Countdown range: 24 hours). Full auto calendar (pre-programmed until the year 2099). 12/24 hour formats. 12/24 hour formats. Button operation tone on/off. Accuracy: +/-15 seconds per month. Battery: CR2025 (Battery life: 7 years). Module 3263. Imported.