• Casio G-SHOCK GAB2100-1A – black octagonal 2100 Series watch with carbon core guard, resin band, Tough Solar power, Bluetooth connectivity, and 200m water resistance.
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CASIO

G-SHOCK GAB2100-1A

G-SHOCK GAB2100-1A

$150.00 USD
$150.00 USD $150.00 USD
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Casio G-SHOCK – Model GAB2100-1A

Iconic Octagonal Design with Solar Power and Smart Connectivity

The GAB2100-1A updates the beloved octagonal GA2100 silhouette with advanced features like Tough Solar power and Bluetooth® connectivity, while keeping the slim, lightweight comfort that made the 2100 Series a modern classic. Built for both urban life and outdoor adventures, it offers the perfect balance of style, durability, and functionality.

Design Overview

This model features a Carbon Core Guard structure combining carbon fiber and resin for exceptional strength and lightness. Its sleek black case and band highlight the minimalistic octagonal bezel design, staying true to the original 2100 aesthetic while adding modern tech upgrades.

Key Highlights

✔ Carbon Core Guard structure for enhanced shock resistance and durability
✔ Tough Solar power system for eco-friendly, low-maintenance operation
✔ Bluetooth® Mobile Link for automatic time adjustment and smart features
✔ 200-meter water resistance for dependable performance
✔ Double LED light (Super Illuminator + LED backlight) for excellent visibility in all conditions
✔ Lightweight construction at only 52 g for all-day comfort

Features & Specifications

Case & Band

  • Size: 48.5 × 45.4 × 11.9 mm

  • Material: Carbon / Resin (case & bezel)

  • Band: Resin band

  • Weight: 52 g

Exterior

  • Glass: Mineral Glass

  • Other: Neobrite

Water Resistance

  • 200-meter water resistance

Smartphone Link & Connectivity

  • Mobile Link: Wireless linking via Bluetooth®

  • App: CASIO WATCHES

  • App Functions: Auto time adjustment, easy watch setting, approx. 300 world time cities, time & place, reminder, phone finder

Timekeeping & Functions

  • World Time: 38 time zones (38 cities + UTC), DST on/off, auto summer time switching, home/world city swap

  • Stopwatch: 1/100-second (first 60 minutes), 1-second (after 60 minutes), elapsed time, lap/split time

  • Timer: 1-second to 60-minute countdown, 1-second and 1-minute increments

  • Alarms: 5 daily alarms + hourly time signal

  • Calendar: Full auto-calendar (to year 2099)

  • Accuracy: ±15 seconds/month (without mobile link)

Lighting

  • Double LED Light: Super Illuminator for face + LED backlight for digital display

  • Light Color: White

  • Selectable illumination: 1.5 or 3 seconds

Battery & Power

  • Power Source: Tough Solar (rechargeable battery)

  • Run Time: Approx. 7 months (normal use) / 18 months (power save mode)

Other Features

  • Hand shift feature

  • 12/24-hour format

  • Date/month display swapping

  • Day display in six languages

  • Battery level indicator

  • Button operation tone on/off

Summary
The Casio G-SHOCK GAB2100-1A blends the iconic 2100 Series octagonal design with modern technology. Featuring a carbon-reinforced structure, solar-powered movement, and Bluetooth® connectivity, it delivers style, comfort, and resilience—ready to adapt to any lifestyle.

For more details, visit the official CASIO website here.

Warranty:

  • The watch is covered by a warranty, providing assurance and protection for your purchase.

▶︎Processing Time & Shipping Policy
▶︎Refund policy
▶︎We only carry G-SHOCK USA products.
▶︎Unfortunately, we DO NOT ship internationally.

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CASIO G-SHOCK COLLECTION

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Gshock, Casio, Made in Japan

Explore Your Favorite G-SHOCK Watches

Explore our current selection of G-SHOCK watches. If you don’t see your preferred model, check the G-SHOCK USA website, note the model number, and contact us via email or phone(415-567-2400) to place your order. Ask about our special deals!

Please note:

  • We only carry G-SHOCK USA products.
  • Unfortunately, we DO NOT ship internationally.
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Our owner, Asuka Saito, is certified by both Gemological Institute of America (GIA) and Cultured Pearl Association of America (CPAA), and we also have a GIA-certified appraiser on staff. Asuka is also a color specialist, certified as a TC Color Therapist and Sensational Color.

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