• Casio G-SHOCK GBM2100A-1A2 – metal-covered 2100 Series watch with stainless-steel bezel, black bio-based resin band, Tough Solar power, Bluetooth connectivity, and 200m water resistance.
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  • G-Shock Casio watch with silver case and blue face on a white background
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  • Text describing a stainless-steel bezel and inner case with G-SHOCK design elements, accompanied by images of the bezels on a white background.
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CASIO

G-SHOCK GBM2100A-1A2

G-SHOCK GBM2100A-1A2

$250.00 USD
$250.00 USD $250.00 USD
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Casio G-SHOCK – Model GBM2100A-1A2

Metal-Covered Design with Solar Power and Smart Connectivity

The GBM2100A-1A2 takes the iconic octagonal 2100 Series and upgrades it with a refined metal-covered design, Bluetooth® connectivity, and the eco-friendly Tough Solar power system. Built with G-SHOCK’s legendary shock resistance and 200-meter water resistance, it offers the perfect balance of style and durability for both casual and professional environments.

Design Overview

  • Bezel & Case: A stainless-steel bezel sits atop a bio-based resin case, blending premium feel with reduced environmental impact.

  • Finish: The bezel features metallic vapor deposition in blue, delivering a sophisticated and modern aesthetic.

  • Build: Bio-based resin band for lightweight comfort, paired with a secure fit for active or daily wear.

  • Technology: Tough Solar charges the watch via sunlight or artificial light, and Bluetooth® Mobile Link syncs it to your smartphone for precise, automatic timekeeping and additional features via the CASIO WATCHES app.

Key Highlights

✔ Stainless-steel bezel with bio-based resin case & band for durability and sustainability
✔ Metallic vapor deposition in blue for a distinctive, premium look
✔ Tough Solar power system for eco-friendly, low-maintenance use
✔ Bluetooth® Mobile Link for automatic time adjustment & app-based functions
✔ Shock-resistant construction & 200-meter water resistance
✔ Comprehensive timing features for travel, sport, and daily life

Features & Specifications

Case & Band

  • Size: 49.3 × 44.4 × 11.9 mm

  • Material: Bio-based resin / Stainless steel (case & bezel)

  • Band: Bio-based resin band

  • Weight: 72 g

Exterior

  • Glass: Mineral Glass

  • Other: Neobrite

  • Compatible Band Size: 145–215 mm

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

    • Approximately 300 world time cities

    • Time & place

    • Reminder

    • Phone finder

Timekeeping & Functions

  • World Time: 38 time zones (DST on/off, home/world 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 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

  • 12/24-hour format

  • Hand shift feature

  • Date/month display swapping

  • Day display in six languages

Summary

The Casio G-SHOCK GBM2100A-1A2 combines the iconic octagonal design of the 2100 Series with premium metal finishing in blue, Bluetooth® smart features, and Tough Solar power. Lightweight, durable, and water-resistant to 200 meters, it’s a versatile timepiece ready to adapt to any environment — from the boardroom to weekend adventures.

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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Trusted Since 1967

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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