CASIO G-SHOCK GA-B2100-1A1

The Casio G-SHOCK GA-B2100-1A1 takes the iconic octagonal "CasiOak" design to the next level by combining Tough Solar charging with Bluetooth smartphone connectivity. Finished in an all-black stealth design, it delivers G-SHOCK's legendary toughness with modern convenience, making it an ideal everyday watch for work, adventure, and everything in between.

Key Features

Stealth All-Black Design
A matte black case, bezel, strap, and dial create a clean, tactical look that's versatile enough for everyday wear.

Tough Solar Technology
Powered by sunlight and artificial light, reducing the need for battery replacements while keeping the watch running reliably.

Bluetooth Smartphone Connectivity
Connect to the CASIO WATCHES app for:

• Automatic time adjustment
• World Time settings
• Phone finder
• Easy watch configuration
• Time & place logging

Carbon Core Guard Structure
Carbon-reinforced construction provides exceptional strength while keeping the watch lightweight and slim.

Analog-Digital Functionality

• World Time (38 time zones)
• 1/100-second stopwatch
• Countdown timer
• 5 daily alarms
• Double LED Super Illuminator
• Full auto-calendar
• Hand shift feature

Specifications

Model: GA-B2100-1A1

Collection: Casio G-SHOCK

Movement: Quartz Analog-Digital (Tough Solar)

Module: 5689

Power Source: Tough Solar rechargeable battery

Bluetooth: Yes

Accuracy: ±15 seconds per month (without Bluetooth synchronization)

Case & Dimensions

• Case Material: Carbon-reinforced resin
• Bezel Material: Resin
• Case Size: 48.5 × 45.4 mm
• Thickness: 11.9 mm
• Crystal: Mineral glass
• Weight: Approx. 52 g

Strap / Bracelet

• Material: Black resin strap
• Clasp: Pin buckle

Water Resistance

200 meters / 20 bar — suitable for swimming, snorkeling, and recreational diving.

Design & Wearability

Despite its rugged construction, the GA-B2100-1A1 maintains the slim profile that made the "CasiOak" famous. The lightweight Carbon Core Guard structure and understated all-black finish make it equally suited to outdoor adventures, daily wear, and casual occasions.

The Casio G-SHOCK GA-B2100-1A1 combines iconic styling with modern technology, offering Tough Solar charging, Bluetooth connectivity, and legendary G-SHOCK durability in a sleek all-black package. It's an excellent choice for anyone looking for a tough, low-maintenance watch packed with everyday functionality.