1/100-second stopwatch 

Measuring capacity: 99 day 23:59'59.99"

Measuring modes: Elapsed time, split time, 1st-2nd place times 

12/24-hour format 

Accuracy: ±15 seconds per month 

Approx. battery life 

5 years on CR2025 

Full auto-calendar (to year 2099) 

Button operation tone on/off 

Countdown

1/100-second stopwatch 

Measuring capacity: 99 day 23:59'59.99"

Measuring modes: Elapsed time, split time, 1st-2nd place times 

12/24-hour format 

Accuracy: ±15 seconds per month 

Approx. battery life 

5 years on CR2025 

Full auto-calendar (to year 2099) 

Button operation tone on/off 

Countdown timer 

Measuring unit: 1 second

Coundown range: 24 hours

Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments

Selection of One-time timer, countdown/count up timer, or auto repeat timer

Other: Preset timer (preset start times: 1, 3, 5, 10, 15, 30, 45, 60 minutes) 

Current time display style (24 styles) 

Custom memo: 14 characters x2 

Electro-luminescent backlight 

Auto light switch, afterglow 

Flash alert 

Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, LED flashes to indicate mode change when button operation tone is turned off. 

Font setting: bold or narrow 

Hourly time signal 

Start and stop time specification. Three patterns (daily, weekend, weekday) 

Multi-function alarms 

5 independent multi-function* alarms (4 one-time alarms and 1 snooze alarm)

*Four patterns (daily, once, weekend, weekday 

Regular timekeeping 

Hour, minutes, seconds, am/pm, year, month, date, day 

Shock resistant (G-SHOCK) 

World time 

31 time zones (31 cities + Universal Corrdinated Time), city code display, daylight saving on/off 

Size of case / total weight 

G-7800 1 50.4 X 43.8 X 15.1 mm / 66 g