Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • 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.
TermsPrivacy
Deal.ai › Casio › Wrist Watches
Casio
Casio G-SHOCK GA-B2100-1AER

Casio G-SHOCK GA-B2100-1AER

Best price now

$139.00at CreationWatchesChecked 19 h ago

Compared across 7 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

Visit CreationWatches

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 $139.00 at CreationWatches on Nov 9.
  • Checked at 7 stores.
  • Our take on the Casio G-SHOCK GA-B2100-1AER

    The GA-B2100 is the Bluetooth and solar version of Casio's octagonal G-SHOCK, the shape borrowed from the original 2100 series. It adds Tough Solar charging and a Bluetooth link to the Casio Watches app for automatic time setting and phone finder, which the plain GA-2100 lacks. At 11.9 mm thick and 52 g it wears far slimmer than most G-SHOCKs, so it slips under a cuff. Owners like the analog-digital display and near-indestructible build; some find the hands and negative LCD hard to read in low light.

    Best forEveryday wear with rugged useBuyers who want solar charging and phone time syncSmall to medium wrists that find bulky G-SHOCKs too bigOutdoor and sports use needing 200 m water resistance
    Pros
    • Tough Solar charging cuts battery swaps
    • Bluetooth syncs time and settings via the Casio Watches app
    • Slim 11.9 mm case and 52 g weight wear easily
    • 200 m water resistance and shock-resistant resin build
    • Analog-digital display with world time across roughly 300 cities
    Cons
    • Negative LCD and thin hands are dim in low light
    • No sapphire crystal, only mineral glass
    • Bluetooth range is short, about 2 m
    • No heart rate or step tracking despite the app

    Casio G-SHOCK GA-B2100-1AER prices at every store

    • JuwelierBektasNew

      In stockShips from Germany · duties may applyReturn policy

      $130.00Checked 21 h ago
      Visit JuwelierBektas
    • CreationWatchesNew

      In stock

      $139.00Free shippingChecked 19 h ago
      Visit CreationWatches
    • AzulineNew

      In stockReturn policy

      $142.00Checked 21 h ago
      Visit Azuline
    • First Class WatchesNew

      In stock

      $160.00Free shippingChecked 19 h ago
      Visit First Class Watches
    • WalmartNew

      In stockSold by DexclusiveReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

      $161.70Free shippingChecked 21 h ago
      Visit Walmart
    • ArgentoNew

      In stock

      $171.95Checked 19 h ago
      Visit Argento
    • KlukkanNew

      In stockShips from Iceland · priced in ISK (ISK 35,990) · duties may applyReturn policy

      $294.47Checked 21 h ago
      Visit Klukkan

    Store links may earn us a commission. Some prices via Klarna.

    Casio G-SHOCK GA-B2100-1AER price history

    Lowest price we've seen: $139.00 on Nov 10 at CreationWatches. Tracked across 3 stores since Nov 10.

    What reviewers say

    Reviewers treat the GA-B2100 as the best all-round CasiOak: solar and Bluetooth fix the two main gripes about the original. Most praise the slim fit, toughness and legibility of the analog hands. Complaints center on the dark LCD and the small light.

    What people mention
    • LegibilityMixedOwners say the analog hands read well but the negative LCD is dim in low light.
    • Solar chargingPraisedBuyers like that sunlight keeps it running without battery changes.
    • Size and weightPraisedThe slim 11.9 mm case and 52 g weight suit smaller wrists and cuffs.
    • BuildPraisedOwners report it survives knocks, water and daily abuse.
    • Bluetooth appMixedTime sync works, but the short range and app dependence draw complaints.
    • GlassCriticisedSome owners find the mineral crystal picks up scratches.

    Specifications

    color
    BlackSource
    size
    48 5MMSource
    Water Resistance
    200 Metres Water ResistantSource
    Accuracy
    +/- 15 seconds per monthSource
    Battery Life
    Approximately 18 months on rechargeable battery

    Questions and answers

    How is the GA-B2100 different from the GA-2100?
    It adds Tough Solar charging and Bluetooth sync with the Casio Watches app. The case shape and size are essentially the same.
    Does it need a battery change?
    No regular swap is needed. A rechargeable cell is charged by light and lasts about 18 months on a full charge without further light.
    Is it good for swimming?
    Yes. It is rated to 200 m water resistance, so swimming and snorkeling are fine. It is not a dive computer.
    How accurate is it?
    Casio rates it at plus or minus 15 seconds per month on its own. With Bluetooth connected, the app resets the time automatically.
    What is in the box?
    The watch, a quick start guide and the usual Casio paperwork. No charging cable is included because it charges from light.
    Does it track steps or heart rate?
    No. The Bluetooth link is for time setting, alarms and phone finder, not fitness tracking.
    Where is the Casio G-SHOCK GA-B2100-1AER cheapest?
    At CreationWatches, for $139.00, as of our latest check.
    Where can I buy the Casio G-SHOCK GA-B2100-1AER?
    7 stores we checked sell it, including CreationWatches, First Class Watches, Argento, Klukkan, JuwelierBektas.

    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
    • 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
    • C
      Casio G-Shock GA-B2100LUU-8A Analog Digital Watch
      Casio G-Shock GA-B2100LUU-8A Analog Digital Watch

    More from Casio

    • C
      Casio G-Steel GBM-2100-1A
      Casio G-Steel GBM-2100-1A
    • C
      Casio G-Shock GBM2100-1A
      Casio G-Shock GBM2100-1A
    • C
      Casio G-Shock GM-2100-1AER
      Casio G-Shock GM-2100-1AER
    • C
      Casio MTP-B210D-2A1V Stainless Steel Watch
      Casio MTP-B210D-2A1V Stainless Steel Watch
    • C
      Casio Analog MRW210HB-5BV
      Casio Analog MRW210HB-5BV
    • C
      Casio MRW-210H-1A Analog
      Casio MRW-210H-1A Analog
    • G
      G-Shock GM2100-1A Metal Bezel
      G-Shock GM2100-1A Metal Bezel
    • C
      Casio DW9052-1BCG Classic
      Casio DW9052-1BCG Classic
    All Casio deals and products →
    Source
    Dimensions
    48.5 x 45.4 x 11.9Source
    Weight
    52Source
    Band Material
    ResinSource
    Glass
    Mineral GlassSource
    Stopwatch Capacity
    24 hoursSource
    Countdown Range
    60 minutesSource
    Alarms
    5 Daily AlarmsSource
    Bluetooth Signal Range
    Up to 2mSource
    World Time Cities
    approximately 300 citiesSource
    Color (Strap)
    BlackSource
    Closure
    BuckleSource
    Watch Strap Material
    Plastic, ResinSource
    Functions
    Timer, Bluetooth, Waterproof, Worldtimer, Stopwatch, Solar, Alarm, DateSource
    Gender
    MaleSource
    Case Color
    BlackSource
    Series
    Casio G-ShockSource
    Movement Type
    QuartzSource
    Type of Index
    Index (without numbers)Source
    Weight (oz)
    1.8Source