Casio G-Shock Black and Bold Red GA-B2100BBR-1AER

Casio G-SHOCK GA-B2100BBR-1AER – Smart power in black and red

Discover the fusion of durability and technology with the Casio GA-B2100BBR-1AER – the standout model of the bold Black and Red collection. This G-SHOCK combines iconic shock resistance with modern design and intelligent features, delivering both style and functionality.

Bold design that gets noticed

The fully black case, strap, and dial contrast sharply with the vivid red high-saturation LCD display. The red accents enhance legibility and add striking visual appeal. Dual Super Illuminator LED lights illuminate both the analog and digital displays at the press of a button.

Lightweight, durable, and eco-friendly

The Carbon Core Guard structure delivers exceptional durability without extra weight:

• Shock-resistant construction
• Water resistance up to 200 meters – ideal for swimming and sports
• Mineral glass and bio-based resin strap – a sustainable and responsible choice
• Weighs only 52 g for excellent all-day comfort

Solar-powered and smart connectivity

Tough Solar technology powers the watch via light, eliminating the need for battery changes. Bluetooth® connectivity to your smartphone (CASIO WATCHES app) provides:

• Automatic time updates
• World time in approximately 300 cities
• Phone finder function
• Time and location log
• Reminders and easy setting management through the app

Versatile features for active use

Whether you're traveling, working, or training, this G-SHOCK keeps up:

• World time: 38 time zones, automatic daylight saving time
• 1/100-second stopwatch: lap and split time measurement
• 60-minute countdown timer
• 5 daily alarms + hourly signal
• Fully automatic calendar (until year 2099)
• Button tone on/off, hand shift function, and Neobrite coating for better visibility
• Battery level indicator and power-saving mode (display turns off in darkness)
• Battery life up to 7 months in normal use (without light exposure)

Technical specifications

• Case size: 48.5 × 45.4 × 11.9 mm
• Weight: 52 g
• Wrist fit: 145–215 mm
• Display: Analog + digital, weekday selectable in six languages
• Accuracy: ±15 seconds per month (without mobile connection)