Casio G-Shock GBM-2100-1A Bluetooth Solar Watch Black Octagonal Case GBM2100

The Casio G-Shock GBM-2100-1A blends classic octagonal design with advanced Bluetooth and Tough Solar tech, giving you a modern edge without losing the iconic G-Shock toughness. Featuring a stealthy black colorway, this slim and lightweight model is part of the popular 2100 “CasiOak” series. It syncs with your smartphone for auto time updates, includes world time, alarms, stopwatch, and is powered by light — no battery change needed. It’s the perfect everyday tool watch, built for tech-savvy minimalists.

• Model: GBM-2100-1A
• Series: G-Shock 2100 Bluetooth Solar (CasiOak Series)
• Display: Analog-Digital with Negative LCD Display
• Functions: Bluetooth Mobile Link, World Time (38 Cities), Stopwatch, Countdown Timer, 5 Daily Alarms, Full Auto Calendar, 12/24-Hour Format
• Power System: Tough Solar (Powered by Light)
• Smartphone Link: Yes (via CASIO WATCHES app)
• Shock Resistant: Yes
• Water Resistance: 200 Meters (Diving-Grade Durability)
• Case Material: Resin with Carbon Core Guard Structure
• Band: Black Resin Strap with Buckle Clasp
• Case Size: 48.5mm × 45.4mm × 11.9mm
• Weight: Approx. 52g
• Color: All Black with Subtle Matte Finish
• Style: Techwear, Streetwear, Utility-Driven Minimalist
• Warranty: One year