CASIO GA100-1A4 G-Shock watch 55 mm black red

X-Large G-Shock for sport timing

The Casio GA100-1A4 is an analogue-digital sports watch with a 55 mm resin case and rubber band. Quartz movement powers a 1/1000-second chronograph, countdown timer, speed timer, world time for 48 cities, daily alarm with snooze, auto LED light with afterglow and day-date calendar. Water resistance is rated to 200 m (660 ft) for serious surface water sports.

Suits athletes needing stopwatch precision

The anti-magnetic, shock-resistant build serves runners, swimmers and outdoor users who want multiple timing functions on a large, high-contrast dial. Buyers who require a watch certified for scuba diving should look elsewhere, as the specification covers professional marine activity and surface sports only.

1/1000-second chronograph decides the fit

This resolution supports split-second lap measurement for interval training and competition timing. If your activity only needs minute-level tracking, a simpler model will cover the requirement.