The Casio G-Shock GA-B2100-1A1ER is a men's watch with a black colorway.

• Case size: 48.5 × 45.4 × 11.9 mm
• Weight: 52 g
• Case and bezel material: Carbon/Resin
• Band material: Resin
• Construction: Shock resistant, Carbon Core Guard structure
• Water resistance: 20 bar
• Power: Tough Solar (solar powered)
• Connectivity: Bluetooth Mobile Link
• Glass: Mineral glass
• Features: Neo Display, Hand retract function, World time (38 cities), 1/100-second stopwatch, Countdown timer

Brand

Casio

Also Known As

Schwarz

Colors

navy/black

Listed

January 21, 2026

Model

G-Shock GA-B2100-1A1ER

Gender

men

Category

Apparel & Accessories/Jewelry/Watches