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Round carbon composite case with black analog-digital dial and resin strap

CASIO

CASIO G-Shock GA-B2100FC-1A Solar Watch 200m 45.40mm

SKU CH-CB5H-8F67B

Solar-powered analog-digital sports watch with carbon composite case, 200 m water resistance and Bluetooth mobile link

  • Watch movementSolar
  • Product shapeRound
  • Watch face colorBlack
  • Dial markingsIndex
  • Display typeAnalog and Digital
  • Date displayDate
  • Solar charging keeps the watch running without battery changes
  • 200 m water resistance suits swimming and diving
  • Carbon composite case at 45.40 mm resists shocks while staying light
  • Resin strap with buckle clasp secures fit during sport
  • Caliber 5689 drives analog-digital display with month, day and date

Solar-Powered G-Shock for Active Users

The Casio GA-B2100FC-1A is a men's sports watch built with a carbon composite case and resin strap. Solar charging keeps the caliber 5689 running without battery changes. Bluetooth mobile link connects the analog-digital display to a phone app. Water resistance to 200m suits swimming and surface water sports.

Thermals Noise and Power Draw

Solar movement eliminates battery replacements and draws power from ambient light. The mineral crystal protects the black dial with index markers. No audible alerts or mechanical noise are specified in the product data. Carbon composite construction keeps the 45.40mm case lightweight on the wrist.

Sustained Load Behaviour

The watch maintains timekeeping and connected functions during extended outdoor use. 200m water resistance holds under continuous immersion pressure. Solar charging supports uninterrupted operation over long periods. Resin strap and buckle clasp remain secure through repeated exposure to sweat, salt water and UV light.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $111.99
Cheaper than about 55% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleSports
Watch face colorBlack
Item conditionNew
Display
Display typeAnalog and Digital
Size & build
Main materialCarbon Composite
Product shapeRound
Strap materialResin
Closure typeBuckle Clasp
Bezel typeFixed Bezel
Housing materialCarbon Composite
Case size45.4 mm
Watch glassMineral Crystal
Environment & compliance
Water resistance200m
More details
Watch movementSolar
Dial markingsIndex
Date displayDate
Suitable forMale

Questions about this item

How do I pair the GA-B2100FC-1A with my phone and which step do people miss?

Install the Casio Watches app, enable Bluetooth on the phone, then hold the watch button to enter pairing mode; the step most skip is granting the app location permission, which is required for the Bluetooth link to complete.

What part will need replacement first on the GA-B2100FC-1A?

The rechargeable solar cell inside caliber 5689 typically lasts many years; after that the resin strap will show wear before the carbon composite case or mineral crystal.

At what depth does the 200 m rating stop being safe for the GA-B2100FC-1A?

The 200 m water-resistance covers swimming and surface sports; it is not rated for scuba diving, so the limit appears once you descend below recreational snorkelling depths.

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