CASIO G-SHOCK GA2100HD-8A

The CASIO G-SHOCK GA2100HD-8A is a standout variant in the popular GA-2100 “CasiOak” series featuring a bold “Hidden Glow” design. Finished in dark grey with white accents and phosphorescent elements, this watch glows in the dark — revealing luminous details for stylish contrast and visibility in low light.

Specifications

Feature	Details
Model	CASIO G-SHOCK GA2100HD-8A
Series	GA-2100 “Hidden Glow”
Display Type	Analog + Digital
Case & Bezel Material	Carbon / Bio-based resin
Band Material	Bio-based resin
Glass Material	Mineral glass
Shock Resistance	Yes (G-SHOCK standard)
Water Resistance	200 m / 20 bar
Case Dimensions (L×W×H)	48.5 × 45.4 × 11.8 mm
Weight	~51 g
Battery Life	Approx. 3 years (SR726W × 2)
World Time	31 time zones (48 cities + UTC), DST on/off
Stopwatch	1/100-second stopwatch
Countdown Timer	Up to 24 hours
Alarms	5 daily alarms + hourly signal
LED Light	Double Super Illuminator (face & display), selectable duration, afterglow
Calendar	Full auto-calendar to year 2099
12/24-Hour Format	Yes
Accuracy	±15 seconds/month
Other Features	Neobrite luminous hands/markers, hand shift feature (hands move away for clear digital view), button tone on/off
Design Notes	Dark grey exterior with glow-in-dark luminous components; white dial contrast