G-Shock • GA2100-1A1 • Men's Watch

Everyday comfort meets G-SHOCK toughness. The GA2100-1A1 pairs an octagonal case with analog-digital timekeeping in a slim, lightweight design. At 11.8 mm thick and just 51 g, it brings practical features to your daily routine without a bulky feel.

A carbon-fibre-reinforced resin case and Carbon Core Guard structure protect the module, while shock resistance and 200-metre water resistance equip this watch for active days. Double LED lighting illuminates the face and digital display, and the hand-shift feature moves the hands aside for a clearer view.

Key features

• Carbon Core Guard structure and shock-resistant construction
• 200-metre water resistance
• Carbon/resin case and bezel, resin band and mineral glass
• Double white LED lighting with selectable 1.5- or 3-second illumination and afterglow
• World time: 31 time zones, 48 cities plus UTC, daylight saving and home/world city swapping
• 1/100-second stopwatch with elapsed, split and first/second-place timing
• 24-hour countdown timer
• Five daily alarms and hourly time signal
• Full auto-calendar to 2099, 12/24-hour format and button-tone on/off

Size and timekeeping

• Case dimensions: 48.5 × 45.4 × 11.8 mm
• Weight: 51 g
• Analog hour and minute hands with day dial; digital hour, minute, second, month and date
• Accuracy: ±15 seconds per month
• Approximate battery life: 3 years on two SR726W batteries