StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Casio
Casio
Casio Men's G-SHOCK GA-B2100 Series Rubber Band GA-B2100-1A1JF

Casio Men's G-SHOCK GA-B2100 Series Rubber Band GA-B2100-1A1JF

Best price now

$132.97at IPPO JAPAN WATCHChecked Nov 9

Prices are checked against each store and labelled with when.

Visit IPPO JAPAN WATCH

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $132.97 at IPPO JAPAN WATCH on Nov 9.

Our take on the Casio Men's G-SHOCK GA-B2100 Series Rubber Band GA-B2100-1A1JF

The Casio G-SHOCK GA-B2100 is the solar and Bluetooth version of the octagonal GA-2100, the "CasiOak." It keeps the slim carbon core guard case and adds Tough Solar charging plus smartphone link for automatic time correction and phone finder. It suits people who want a tough everyday watch with analog-digital hands and no battery swaps. Against the plain GA-2100 it adds solar and Bluetooth at a slightly higher cost; against metal-cased G-SHOCKs it is lighter and less flashy. Owners like the look and the set-and-forget charging.

Best forEveryday wear with casual or street outfitsBuyers who want solar charging and no battery changesPeople who want automatic time sync via their phoneFans of the octagonal CasiOak look
Pros
  • Tough Solar charging reduces battery worries
  • Bluetooth link syncs time and finds your phone
  • Slim carbon core guard case wears smaller than most G-SHOCKs
  • Analog-digital dial with day and date
  • 200 m water resistance and shock resistance
  • Minimalist black-on-black look
Cons
  • Hands and markers can be hard to read in low light
  • Bluetooth and solar add cost over the base GA-2100
  • Resin band and bezel show scratches over time
  • No sapphire crystal or metal case at this level

Casio Men's G-SHOCK GA-B2100 Series Rubber Band GA-B2100-1A1JF prices at every store

  • IPPO JAPAN WATCHNew

    In stockShips from Japan · priced in JPY (¥21,002) · duties may applyReturn policy

    $132.97Checked Nov 9
    Visit IPPO JAPAN WATCH

What reviewers say

Owners rate the GA-B2100 as a good-looking, tough daily watch. They like the solar charging and the slimmer case, and many say the Bluetooth time sync means it is always correct. The main complaints are legibility in dim light and the resin parts aging.

What people mention
  • LegibilityCriticisedOwners say the dark dial and thin hands are hard to read in dim light.
  • Solar chargingPraisedBuyers like that daylight keeps it charged without battery changes.
  • Size and fitPraisedThe slim carbon case is described as comfortable and smaller than typical G-SHOCKs.
  • Bluetooth syncMixedTime sync is convenient, but some find pairing and the app fiddly.
  • BuildMixedThe watch feels tough, though the resin band and bezel show wear.

About the Casio Men's G-SHOCK GA-B2100 Series Rubber Band GA-B2100-1A1JF

The G-SHOCK GA-B2100-1A1JF is a men's watch with a digital and analog display and a black resin band. It keeps the octagonal form of the GA-2100 and adds smartphone link and Tough Solar charging. The case is carbon resin with inorganic glass, and the shock-resistant structure pairs a carbon core guard with a slim module to keep the size compact.

The watch pairs with compatible mobile phones over Bluetooth. A hand shift feature temporarily moves the hands above the digital display when they overlap it. It has world time for 38 cities plus UTC, a stopwatch, a timer, 5 daily alarms and an hourly time signal. A dual LED light illuminates the dial and the LCD.

Gender
Men's
Display
Digital and analog
Power
Tough Solar (solar charging system)
Battery life
About 7 months on a full charge without solar power; about 18 months in power-saving mode
Case size
45.4 mm
Case shape
Round
Case material
Carbon resin
Glass
Inorganic glass
Band
Resin band, black
Band length
145-215 mm, 26.1 mm wide
Weight
52 g
Water resistance
20 ATM
Dial color
Black series
Connectivity

Questions and answers

Is the GA-B2100 worth it over the GA-2100?
It adds Tough Solar and Bluetooth time sync to the same octagonal design. If you want no battery changes and automatic time correction, it is the better pick; otherwise the base model covers the look.
Does it need a battery change?
No. Tough Solar charges from light through the dial, and the rechargeable cell is not a user-swapped battery.
Can I read it in the dark?
It has a double LED light for the dial and LCD. Owners still find the hands and dark dial hard to read in low light without it.
Is it good for swimming?
Yes. It is rated for 200 m water resistance and shock resistant, so swimming and showering are fine.
What does the Bluetooth link do?
It syncs the time with your phone, sets world time and helps find a misplaced phone.
How does it compare with a metal G-SHOCK?
It is lighter and slimmer, with a resin case and band. Metal models feel heavier and more premium but cost more.
Where is the Casio Men's G-SHOCK GA-B2100 Series Rubber Band GA-B2100-1A1JF cheapest?
At IPPO JAPAN WATCH, for $132.97, as of our latest check.

Shoppers also compared

  • G
    G-Shock GAB2100-1A1
    G-Shock GAB2100-1A1
  • G
    G-Shock x Ron Herman GA-B2100
    G-Shock x Ron Herman GA-B2100
  • C
    Casio GA-B2100-1AJF G-Shock GA-B2100 Series Men's Rubber Band Watch
    Casio GA-B2100-1AJF G-Shock GA-B2100 Series Men's Rubber Band Watch
  • C
    Casio G-SHOCK GA-B2100-1AER
    Casio G-SHOCK GA-B2100-1AER
  • G
    G-Shock 2100 Series Bluetooth and Solar (GA-B2100-1A1ER)
    G-Shock 2100 Series Bluetooth and Solar (GA-B2100-1A1ER)
  • C
    Casio G-Shock Analog Digital Smartphone Link Bluetooth Green Dial Solar GA-B2100FC-3A 200M Men's Watch
    Casio G-Shock Analog Digital Smartphone Link Bluetooth Green Dial Solar GA-B2100FC-3A 200M Men's Watch
  • C
    Casio G-Shock Analog-Digital Green GA-B2100-3APR
    Casio G-Shock Analog-Digital Green GA-B2100-3APR
  • C
    Casio G-Shock Bluetooth Digital Watch GAB2100-3A
    Casio G-Shock Bluetooth Digital Watch GAB2100-3A

More from Casio

  • C
    Casio G-Shock GA-B2100 1ACR CasiOak Solar Bluetooth
    Casio G-Shock GA-B2100 1ACR CasiOak Solar Bluetooth
  • C
    Casio G-Shock (GA-2100FL-1A)
    Casio G-Shock (GA-2100FL-1A)
  • C
    CASIO G-SHOCK ANALOG-DIGITAL RESIN BAND GA-B2100LUU SERIES WATCH
    CASIO G-SHOCK ANALOG-DIGITAL RESIN BAND GA-B2100LUU SERIES WATCH
  • C
    Casio G-Shock 2100 Utility Black Digital Quartz Watch
    Casio G-Shock 2100 Utility Black Digital Quartz Watch
  • C
    Casio GA-B2100 G-Shock Series Wristwatch w/ Bluetooth, Solar
    Casio GA-B2100 G-Shock Series Wristwatch w/ Bluetooth, Solar
  • C
    Casio G-Shock GA-2100 Pink Beige
Bluetooth mobile link with compatible mobile phones
World time
38 cities (38 time zones) plus UTC, automatic daylight saving adjustment, city swapping for home time
Stopwatch
1/100 second (under 1 hour), 1 second (over 1 hour), 24-hour, lap/split function
Timer
Set unit 1 second, maximum 60 minutes, measured in 1-second increments
Alarms
5 daily alarms and hourly time signal
Calendar
Full auto calendar; date display switches between month/day
Day display
6 languages: English, Spanish, French, German, Italian, Russian
Time format
12/24 hour switching
Light
Dual LED: dial light and LCD backlight (Super Illuminator), afterglow time switchable between 1.5 and 3 seconds
Other features
Shock-resistant structure, battery indicator, power saving function that turns off the display in the dark, operation sound on/off, hand shift
Casio G-Shock GA-2100 Pink Beige
  • G
    G-SHOCK アナログデジタル 2100シリーズ メンズ 腕時計 GA-B2100-1A
    G-SHOCK アナログデジタル 2100シリーズ メンズ 腕時計 GA-B2100-1A
  • C
    Casio GA-2100BM-7A8
    Casio GA-2100BM-7A8
  • All Casio deals and products →

    More men's analog watches

    • C
      Casio G-Shock Bluetooth Solar Analog Digital Dial All Black Men Watch GA-B2100-1A1JF
      Casio G-Shock Bluetooth Solar Analog Digital Dial All Black Men Watch GA-B2100-1A1JF
    • C
      Casio G-Shock GA-B2100 FC-1ADR CasiOak Solar Bluetooth Blue
      Casio G-Shock GA-B2100 FC-1ADR CasiOak Solar Bluetooth Blue
    • C
      Casio G-Shock GA-B2100 LUU-5ADR CasiOak Solar Bluetooth Matte Grey
      Casio G-Shock GA-B2100 LUU-5ADR CasiOak Solar Bluetooth Matte Grey
    • C
      Casio G-Shock Analog-Digital Black GA-B2100-1APR
      Casio G-Shock Analog-Digital Black GA-B2100-1APR
    • C
      Casio Analog GA-B2100C-9AER
      Casio Analog GA-B2100C-9AER
    • C
      Casio MTP-1370D-1A2
      Casio MTP-1370D-1A2
    • C
      Casio G-Shock 2100 Series Analog-Digital 'Black' GA-2100-1A1
      Casio G-Shock 2100 Series Analog-Digital 'Black' GA-2100-1A1
    • C
      Casio Quartz Analog MTP-V001D-7B Men's Watch
      Casio Quartz Analog MTP-V001D-7B Men's Watch