1/100-second stopwatch. 

Measuring capacity: 23:59' 59.99". 

Electro-luminescent backlight. 

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

Auto light switch, dual illuminator, selectable illumination duration, afterglow. 

Other: Auto-start. 

Flash alert. 

12/24-hour format. 

Flashes with

1/100-second stopwatch. 

Measuring capacity: 23:59' 59.99". 

Electro-luminescent backlight. 

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

Auto light switch, dual illuminator, selectable illumination duration, afterglow. 

Other: Auto-start. 

Flash alert. 

12/24-hour format. 

Flashes with buzzer that sounds for alarms, hourly time signal, countdown time up alarm, countdown timer progress beeper, and stopwatch auto start. 

Accuracy: ±15 seconds per month. 

Hourly time signal. 

Multi-function alarms. 

Approx. battery life. 

3 independent multi-function alarms (2 one-time alarms and 1 snooze alarm). 

5 years on CR2016. 

Regular timekeeping. 

Auto-calendar (to year 2099). 

Hour, minutes, seconds, pm, month, date, day. 

Button operation tone on/off. 

Shock resistant (G-SHOCK). 

Countdown timer. World Time. 

Measuring unit: 1 second. 

29 time zones (48 cities), city code display, daylight saving on/off. 

Countdown range: 24 hours.

Size of case / total weight. 

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

G-8100 .. Other: Auto-repeat, progress beeper. 

43.6 x 39.8 x 13.9 mm / 59 g. 

Model Number: G-8100 8000 Series.