Casio ANALOG-DIGITAL Charles Darwin Foundation 2100 Series Watch. GAB2100DF-4A - The "Solar Flare" CasiOak

The GA-B2100DF-4A is a masterclass in Color-Blocking. It features a bold, monochromatic exterior that serves as a high-visibility frame for a jet-black dial. The contrast is striking, making the watch feel less like a traditional timepiece and more like a specialized piece of safety equipment.

Like the GA-B2100-1A we covered, this is the "top-tier" version of the silhouette, meaning it isn't just about the loud color—it's backed by Tough Solar and Bluetooth® Connectivity, making it a "set-and-forget" powerhouse.

Key Performance Features

High-Saturation Matte Resin: A specialized "Digital Flare" red-orange finish that is designed to resist fading and maintain its "neon" pop over years of wear.

Tough Solar Power: The dial doubles as a solar panel, allowing the watch to recharge from any light source, eliminating the need for battery changes.

Smartphone Link (Bluetooth®): Seamlessly pairs with your phone for automatic time precision, easy world time swaps, and a handy "Phone Finder" function.

Carbon Core Guard: An internal carbon-fiber-reinforced structure that provides maximum shock protection while keeping the watch incredibly slim (11.9 mm).

Double LED (Super Illuminator): Features a high-brightness white LED that makes the black dial and white-tipped hands glow with surgical clarity in the dark.

1/100-Second Stopwatch: Includes the full suite of G-SHOCK timing tools, including 5 daily alarms and a 24-hour countdown timer.

200m Water Resistance: Fully professional-grade protection—this "Bright Red" beacon is ready for the deep sea or the mud.

In the Box
G-SHOCK GA-B2100DF-4A "Digital Flare," Signature G-SHOCK Hexagonal Tin, User Manual, and Warranty.