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CASIO G-SHOCK GA2100-4A

The GA2100‑4A is a striking analog‑digital G‑Shock watch with a vibrant red resin case, bezel, and band that give it a standout look without compromising toughness. Built with Casio’s Carbon Core Guard structure, the case is reinforced with carbon fibre‑infused resin, offering excellent shock resistance while keeping the watch thin and lightweight. Its octagonal bezel design and minimalist dial deliver modern style, paired with essential G‑Shock functionality—ideal for everyday wear, sports, and outdoor use. The watch combines reliable timekeeping with features like world time, stopwatch, countdown timer, alarms, and LED illumination.

Specifications

Feature	Specification
Model	CASIO G‑SHOCK GA2100‑4A
Type	Analog‑Digital Hybrid
Case / Bezel Material	Carbon‑reinforced Resin (Carbon Core Guard)
Band Material	Resin (Red)
Glass / Crystal	Mineral Glass
Display Type	Analog & Digital
Shock Resistance	Yes (G‑Shock shock‑resistant construction)
Water Resistance	200 meters / 20 bar
World Time	31 time zones (48 cities + UTC), DST on/off
Stopwatch	1/100‑second stopwatch (elapsed, split times)
Countdown Timer	Up to 24 hours (1‑second increments)
Alarms	5 daily alarms + hourly time signal
Full Auto‑Calendar	Yes (up to year 2099)
LED Light	Double LED light (Super illuminator for face and digital display, selectable duration)
Accuracy	±15 seconds per month
Time Format	12/24‑hour format
Hand Shift Feature	Yes (hands move aside for unobstructed digital view)
Battery Life	Approx. 3 years (2 × SR726W)
Case Dimensions	~48.5 × 45.4 × 11.8 mm
Weight	~51 g
Other Features	Button tone on/off, full auto‑calendar, analog & digital time display