Casio G-Shock G-7900A-4DR

Electro-luminescent backlight
Auto light switch, selectable illumination duration (3 seconds or 5 seconds), afterglow Flash alert
Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto start Low temperature resistant (-20°C) World time
29 time zones (48 cities), daylight saving on/off Moon data (moon age of the input data, moon phase graph) Tide graph (tide level for specific date and time) 1/100-second stopwatch (ST1)
Measuring capacity: 999:59'59.99''
Measuring modes: Elapsed time, split time, 1st-2nd place times
Other: 5-second countdown auto start 1/100-second stopwatch (ST2)
Measuring capacity: 999:59'59.99''
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 minute to 24 hours (1-minute increments and 1-hour increments)
Others: Auto-repeat, progress beeper 5 multi-function alarms (with 1 snooze alarm) 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: 2 years on CR2025

Size of case / Total weight

• Size of case : 52.4×50×17.7mm
• Total weight : 68.2g