G-SHOCK GA2100RRB-4A

Casio G-SHOCK GA2100RRB-4A – 2100 Series Analog-Digital Watch

The Casio G-SHOCK GA2100RRB-4A brings the iconic 2100 series “CasiOak” design into a bold brand-red colorway, combining a slim profile with advanced G-SHOCK toughness. Featuring an analog-digital display and a Carbon Core Guard structure, this model is designed for durability, comfort, and modern street style.

Design Overview

The GA2100RRB-4A is defined by its distinctive octagonal bezel and streamlined case design. The vivid red resin case and band are paired with black accents and an inverted LCD, creating strong visual contrast. A vapor-deposited red finish on the dial blends seamlessly with the bezel and band, expressing the unmistakable toughness of G-SHOCK with a refined, lightweight feel.

Key Highlights

• 2100 series octagonal bezel with slim, lightweight construction.
• Carbon Core Guard structure for enhanced shock resistance.
• 200-meter water resistance for everyday and active use.
• Bio-based resin band to help reduce environmental impact.
• Analog-digital display with hand shift function for clear visibility.

Features

Case & Band

• Case Size (L × W × H): 48.5 × 45.4 × 11.8 mm
• Material: Carbon / Bio-based resin
• Band: Bio-based resin band
• Weight: 51 g

Durability

• Shock Resistant with Carbon Core Guard structure.
• Water Resistance: 200 meters

Exterior

• Glass: Mineral Glass
• Luminous Feature: Neobrite on hands
• Compatible Band Size: 145 to 215 mm

Technology & Functional Highlights

World Time

• World Time: 31 time zones (48 cities + Coordinated Universal Time)
• Daylight saving on/off

Stopwatch

• 1/100-second stopwatch
• Measuring Capacity:
  • 00'00"00–59'59"99 (first 60 minutes)
  • 1:00'00–23:59'59 (after 60 minutes)
• Measuring Modes: Elapsed time, split time, 1st–2nd place times

Countdown Timer

• Measuring Unit: 1 second
• Countdown Range: 24 hours
• Start Time Setting: 1 second to 24 hours
• Increments: 1-second, 1-minute, and 1-hour increments

Alarms & Signals

• 5 Daily Alarms
• Hourly Time Signal

Lighting

• Double LED Light (Super Illuminator)
• LED light for the face and digital display
• Selectable illumination duration (1.5 seconds or 3 seconds)
• Afterglow
• Light Color: White

Calendar & Accuracy

• Full Auto-Calendar: Up to year 2099
• Accuracy: ±15 seconds per month

Additional Functions

• 12/24-hour format
• Hand Shift Feature: Hands move out of the way for unobstructed digital display.
• Mute Feature: Button operation tone on/off
• Regular Timekeeping:
  • Analog: Hour, minute (hand moves every 20 seconds), 1 dial (day)
  • Digital: Hour, minute, second, pm, month, date

Power & Battery

• Battery Life: Approx. 3 years on SR726W × 2

Summary

The Casio G-SHOCK GA2100RRB-4A delivers the perfect balance of slim design, advanced carbon protection, and bold red styling. With its lightweight feel, 200-meter water resistance, world time, and versatile analog-digital display, this model is ideal for street fashion, daily wear, and active lifestyles. A modern G-SHOCK that showcases strength through refined design.

Warranty

• This watch is covered by an official manufacturer warranty.

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