*All Casio watches are 100% authentic. Casio manufactures its products in select countries, including Japan, China, and Thailand. Each facility adheres to the brand's strict and consistent quality standards to ensure superior craftsmanship.

• Case Size (L × W × H): 48.5 × 45.4 × 11.9 mm
• Weight: 52 g
• Case & Bezel Material: Carbon / Bio-based resin
• Band: Bio-based resin band
• Construction: Shock Resistant; Carbon Core Guard structure
• Water Resistance: 200-meter water resistance
• Time Adjustment: Bluetooth; connects to a smartphone and automatically adjusts the time
• Power Supply & Battery Life: Tough Solar (Solar powered)
• Net Quantity: 1 piece
• Indian Product Code: G1758
• Country of Origin: China
• Smartphone Link Feature: Mobile Link (Wireless linking using Bluetooth®)
• App: CASIO WATCHES
• App Connectivity Features: Auto time adjustment; Easy watch setting; Approximately 300 world time cities; Time & Place; Reminder; Phone Finder
• Glass: Mineral Glass
• Compatible Band Size: 145–215 mm
• Other: Neobrite
• World Time: 38 time zones (38 cities + UTC), city code display, city name display, daylight saving on/off, auto DST switching, Home City/World Time City swapping
• Stopwatch:
  • Type: 1/100-second stopwatch
  • Measuring Capacity: 00'00''00–59'59''99 (first 60 minutes); 1:00'00–23:59'59 (after 60 minutes)
  • Measuring Unit: 1/100 second (first 60 minutes); 1 second (after 60 minutes)
  • Modes: Elapsed time, Lap/Split time
• Timer:
  • Type: Countdown timer
  • Measuring Unit: 1 second
  • Countdown Range: 60 minutes
  • Start Time Setting: 1 second to 60 minutes (1-second and 1-minute increments)
• Alarm / Hourly Time Signal: 5 daily alarms; Hourly time signal
• Light:
  • Double LED light
  • Face LED: Super Illuminator, selectable illumination duration (1.5 or 3 seconds), afterglow
  • Digital Display LED Backlight: Super Illuminator, selectable illumination duration (1.5 or 3 seconds), afterglow
• Light Color: White LED
• Calendar: Full auto-calendar (to year 2099)
• Mute Feature: Button operation tone on/off
• Energy Saving Feature: Power Saving (display goes blank in the dark to save power)
• Battery Display / Alert: Battery level indicator
• Run Time:
  • Approximately 7 months on rechargeable battery (normal use after full charge)
  • Approximately 18 months on rechargeable battery (stored in darkness with Power Save enabled after full charge)
• Accuracy: ±15 seconds per month (without Mobile Link)
• Other Features:
  • Hand Shift feature
  • 12/24-hour format
  • Date/Month display swapping
  • Day display: 6 selectable languages
  • Regular Timekeeping:
    • Analog: 2 hands (hour, minute); 1 dial (battery level, mode)
    • Digital: Hour, minute, second, PM, month, date, day

Sally Lightfoot Crab

Special features to commemorate a special collaboration

Special, plastic-free packaging

Solar-powered timekeeping with Bluetooth® for enhanced accuracy and reliability

LED light

Charles Darwin Foundation

The Charles Darwin Foundation is an international nonprofit organization that operates the Charles Darwin Research Station. It is the first international organization to engage in conservation activities in the Galápagos Islands, starting in 1959. Currently, it has over 100 staff members from all over the world involved in a range of activities, including surveying the Galápagos Islands’ marine and terrestrial life and ecosystems, promoting island nature conservation efforts, and providing environmental education to local residents.

Sally Lightfoot Crab

GA-B2100DF-4A

The Sally Lightfoot Crab lives on the rocky shores and sandy beaches of the Galápagos Islands. Its vivid body colors are expressed in the bold red and orange color scheme. A playful depiction of the crab raising its claws appears on the indicator hand and the band loop. The dial is also adorned with a silhouette inspired by the Galápagos Islands.

Special features to commemorate a special collaboration

The case back is engraved with the Charles Darwin Foundation logo, and the band is printed with the statement “Apoyo la conservación de Galápagos.” (Spanish for “I support Galápagos conservation.”) These watches come complete with special, plastic-free packaging.

Attention to materials: Bio-based resin

Key resin components used in the bezel and band are made with bio-based resin, a material expected to help reduce environmental impact.

Solar-powered timekeeping with Bluetooth® for enhanced accuracy and reliability

Super Illuminator (high-brightness double LED light) for maintaining watch readability in the dark

Customer Reviews on Casio Analog-Digital 2100 Series Watch - GA-B2100DF-4ADR

Q&A on Casio Analog-Digital 2100 Series Watch - GA-B2100DF-4ADR

Customer questions & answers