Casio G-Shock GD-100-1ADR

LED Backlight
Auto light switch, selectable illumination duration, afterglow. Flash alert
Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm Multi time (4 different cities) World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city / World time city swapping 1/100-second stopwatch
Measuring capacity: 23:59'59.99''
Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer
Measuring unit: 1/10 second
Input range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) 5 alarms (daily or one-time) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 7 years on CR2025

Size of case / Total weight

• Size of case : 55×51.2×17.4mm
• Total weight : 72g