Casio G-Shock Black Digital Tide (G-7900-1DR)

Mineral Glass
Shock Resistant
200-meter water resistance
Case / bezel material: Resin
Resin Band
Electro-luminescent 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, countdown timer progress beeper, and stopwatch auto start
Low temperature resistant (-20°C)
World time
29 time zones (48 cities), city code display, 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: 52.4 × 50 × 17.7 mm
Total weight: 68.2 g
EL:Blue Green