We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • StyleSports
  • MaterialCarbon Composite
  • MovementSolar
  • ShapeRound
  • Dial ColorBlack
  • Dial MarkersIndex
  • 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.

Highlights

  • 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

Specifications

BrandCASIO
StyleSports
MaterialCarbon Composite
MovementSolar
ShapeRound
Dial ColorBlack
Dial MarkersIndex
DisplayAnalog and Digital
DateDate
Band MaterialResin
FastenerBuckle Clasp
GenderMale
ConditionNew
BezelFixed Bezel
Case MaterialCarbon Composite
Case Thickness45.40 mm
CrystalMineral Crystal
Water-Resistant200m
Special FeaturesMineral Crystal,Buckle Clasp,Month, Day And Date Display

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.