The Casio G-Shock GA-B2100-1ADR marks a monumental evolution in the iconic 2100 series, fondly dubbed the "CasiOak" by watch enthusiasts worldwide. Retaining the slim, octagonal silhouette that made its predecessor a global sensation, the GA-B2100-1ADR brings game-changing technological upgrades: Tough Solar power and Bluetooth® Smartphone Link connectivity. Available in Sri Lanka through Ranasinghe Watch Works, this timepiece seamlessly bridges heritage G-Shock toughness with modern smart efficiency.

Premium Design

Showcasing a stealthy, matte black aesthetic with sharp contrast hands, the GA-B2100-1ADR presents a refined minimalist aesthetic. The legendary octagonal bezel draws inspiration from classic luxury sport watch designs while retaining G-Shock’s signature rugged DNA. Despite packing solar cells and advanced Bluetooth components, Casio successfully maintained a surprisingly slim profile, measuring just 11.9 mm in thickness.

Dial Features

The dial layout utilizes an analog-digital combo display that offers optimal legibility under any lighting condition. Dual LED illumination (Super Illuminator) brightens both the analog face and the digital sub-display with an adjustable glow duration. High-contrast hour markers and hands treated with Neobrite ensure quick time checks in low light, while a dedicated mode indicator dial at the 9 o'clock position displays solar charge levels and function modes.

Case Features

Engineered with Casio’s revolutionary Carbon Core Guard structure, the inner case is crafted from high-rigidity carbon-fiber resin. This advanced material protects the module from impact, vibration, and environmental stress while keeping the watch lightweight. The outer resin bezel guards against direct impacts from any angle, ensuring your watch stands up to the toughest Sri Lankan adventures.

Movement

At the heart of the GA-B2100-1ADR is a high-precision Japanese quartz movement powered by Casio’s Tough Solar technology. The watch converts light from any source—natural sunlight or indoor fluorescent lights—into electrical energy, storing it in a rechargeable battery. When connected to your smartphone via Bluetooth®, the movement automatically syncs four times daily with atomic time servers to guarantee exact precision wherever you travel.

Strap/Bracelet

The watch is fitted with a durable, flexible black resin band designed for high performance and everyday comfort. The strap features a heavy-duty stainless steel pin buckle and quick-release spring bars, making strap changes fast and straightforward.

Water Resistance

Built to thrive in water, the GA-B2100-1ADR features full 200-meter (20 bar) water resistance. Whether you are swimming, snorkeling, diving, or caught in heavy tropical monsoon rains in Sri Lanka, this timepiece delivers complete water protection without compromise.

Comfort

Weighing just 52 grams, the GA-B2100-1ADR is remarkably light on the wrist. The ergonomic curvature of the carbon-reinforced resin case paired with the flexible resin strap prevents wrist fatigue, making it comfortable enough for all-day continuous wear during work, sports, or outdoor adventures.

Ideal For

The Casio G-Shock GA-B2100-1ADR is ideal for:

• Watch collectors looking for an iconic, solar-powered "CasiOak."

• Professionals wanting a rugged yet sleek watch that fits comfortably under a dress shirt cuff.

• Outdoor enthusiasts and athletes requiring 200m water resistance and shock protection.

• Tech-savvy users who appreciate automatic Bluetooth® time correction.

Why Buy From Ranasinghe Watch Works

Established in 1931, Ranasinghe Watch Works is Sri Lanka’s premier destination for original timepieces. When you purchase your Casio G-Shock GA-B2100-1ADR from us, you receive:

• 100% Guaranteed Authenticity: Directly sourced original Casio stock.

• Official Warranty: Complete local warranty protection supported by expert technicians.

• Over 90 Years of Heritage: Decades of trusted watchmaking experience in Sri Lanka.

• Secure Nationwide Delivery: Safe, reliable shipping to your doorstep anywhere in Sri Lanka.

Conclusion

The Casio G-Shock GA-B2100-1ADR represents the gold standard of modern utility timepieces. Combining classic octagonal styling with eco-friendly solar charging and smartphone connectivity, it is a future-proof investment for any watch lover. Secure your authentic Casio GA-B2100-1ADR today at Ranasinghe Watch Works and experience unmatched durability and style.

PRODUCT HIGHLIGHTS

• Iconic octagonal bezel design ("CasiOak" aesthetic) in a stealth matte black finish.

• Eco-friendly Tough Solar technology charges under sunlight and indoor artificial light.

• Smartphone Link via Bluetooth® for automatic time adjustments and easy watch settings.

• Carbon Core Guard structure provides maximum shock resistance with minimal weight.

• 200-meter (20 bar) water resistance suitable for swimming and water sports.

• Dual LED Super Illuminator backlight for crystal-clear night visibility.

• World time coverages covering 38 time zones with auto daylight saving time updates.

• Phone Finder feature lets you locate your misplaced smartphone with a button press.

• Lightweight design weighing only 52 grams for all-day ergonomic wearing comfort.

• Authentic Casio stock with official warranty from Ranasinghe Watch Works (Est. 1931).

KEY FEATURES

• Brand: Casio

• Model: GA-B2100-1ADR

• Gender: Men / Unisex

• Collection: G-Shock (2100 Series)

• Movement: Tough Solar Quartz

• Display: Analog-Digital Combo

• Glass: Mineral Glass

• Case Material: Carbon / Resin

• Band Material: Resin

• Band Color: Black

• Dial Color: Black

• Case Diameter: 45.4 mm

• Case Thickness: 11.9 mm

• Weight: 52 g

• Water Resistance: 200 Meters (20 Bar)

• Calendar: Full Auto-Calendar (to year 2099)

• Battery: Solar Rechargeable Battery (7 months operational on full charge without further exposure to light)

• Warranty: Official Casio Manufacturer Warranty

• Country of Origin: Japan Movement / Assembled in Thailand

BUYING REASONS

1. Never Need Battery Replacements: Tough Solar power converts light into continuous battery power.

2. Atomic-Level Accuracy: Auto time synchronization via Bluetooth® through your smartphone.

3. Unrivaled Durability: Built with Casio's Carbon Core Guard structure for high shock absorption.

4. Versatile Styling: Sleek all-black design pairs easily with streetwear, sportswear, or business casual outfits.

5. Ultra-Slim Profile: At just 11.9 mm thin, it is one of the slimmest digital-analog G-Shock watches available.

6. Water-Ready Performance: 200m water resistance protects against deep-water swimming and aquatic activities.

7. Find Your Phone Easily: Integrated Phone Finder feature triggers your smartphone's ringtone at a single button touch.

8. Low Light Visibility: Dual LED lights illuminate the analog dial and digital display clearly.

9. Global Timekeeping: Effortlessly switch between home and local time across 38 global time zones via the CASIO WATCHES app.

10. Trusted Sri Lankan Retailer: Backed by Ranasinghe Watch Works' trusted reputation since 1931.

SHOP MORE CASIO

• Explore the complete Casio Collection at Ranasinghe Watch Works.

• Browse the full G-Shock Collection online.

LEARN MORE ABOUT THIS WATCH

• Visit the official manufacturer page: Casio G-Shock Global Website

FAQ

1. Is the Casio G-Shock GA-B2100-1ADR completely solar powered?

Yes, the watch features Casio’s Tough Solar technology, which charges using artificial indoor lighting as well as direct sunlight.

2. Can I use the GA-B2100-1ADR without connecting it to a smartphone?

Yes. The watch functions as a standalone shock-resistant timepiece with high precision even without Bluetooth® pairing.

3. What application do I download to connect the watch to my smartphone?

You can download the official CASIO WATCHES app on both iOS and Android smartphones.

4. How long does the battery last on a full solar charge?

On a full charge, the rechargeable battery operates for roughly 7 months under normal usage without further light exposure, and up to 18 months in power-saving mode.

5. Is the Casio GA-B2100-1ADR suitable for swimming and diving?

Yes, it features a 200-meter (20 Bar) water resistance rating, making it suitable for swimming, snorkeling, and recreational diving.

6. What is the difference between the GA-2100 and GA-B2100 series?

The GA-B2100 series adds Tough Solar charging and Bluetooth® Smartphone Link connectivity, while keeping the famous thin octagonal shape of the original GA-2100.

7. How heavy is the GA-B2100-1ADR watch?

The watch is exceptionally lightweight, weighing approximately 52 grams due to its Carbon Core Guard construction.

8. Does the watch come with an official warranty in Sri Lanka?

Yes, purchasing from Ranasinghe Watch Works ensures you receive an original watch backed by an official warranty.

9. Can I change the resin strap on the GA-B2100-1ADR?

Yes, the strap features quick-release slide levers, allowing you to change straps easily without special tools.

10. Does Ranasinghe Watch Works offer island-wide delivery in Sri Lanka?

Yes, Ranasinghe Watch Works provides secure delivery across Sri Lanka.