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G-SHOCK

GAB2100MF-1A

$329.00

Bold black meets vibrant colour in these tough G-SHOCK watches with fluorescent accents. The matte black bezel and band contrast stylishly with touches of vivid blue, pink, and yellow on the hands, hour markers, and dial marks, transporting you to a virtual world. Playful and bold, these designs will crush in any fashion scene. Choose your favourite of five timepieces — the GA-100, GA-110, or GA-700 with large case; the GA-B2100 with octagonal bezel plus Bluetooth and solar charging; or the GX-56 digital watch with large case. Cool matte black and fluorescent colours come together in a stand-out pairing. Which one do you want?

Basic Information
  • Band
    Bio-based resin band
  • Case and bezel material
    Carbon / Bio-based resin
  • Case size (L × W × H)
    48.5 × 45.4 × 11.9 mm
  • Construction
    Shock Resistant, Carbon Core Guard structure
  • Power supply and battery life
    Tough Solar (Solar powered)
  • Time adjustment
    Bluetooth: Connects to a smartphone and automatically adjusts the time
  • Water resistance
    200-metre water resistance
  • Weight
    52 g

Exterior
  • Compatible band size
    145 to 215 mm
  • Glass
    Mineral Glass
  • Other
    Neobrite

Smartphone Link / App Connectivity Features
  • App connectivity feature
    Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Time & place, Reminder, Phone finder
  • Apps
    CASIO WATCHES
  • Smartphone link feature
    Mobile link (Wireless linking using Bluetooth®)

Features
  • Accuracy
    Accuracy: ±15 seconds per month (with no mobile link function)
  • Alarm / hourly time signal
    5 daily alarms
    Hourly time signal
  • Battery display alert
    Battery level indicator
  • Calendar
    Full auto-calendar (to year 2099)
  • Energy saving feature
    Power Saving (display goes blank to save power when the watch is left in the dark)
  • Light
    Double LED light
    LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
  • Mute feature
    Button operation tone on/off
  • Other features
    Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
    12/24-hour format
    Date/month display swapping
    Day display (days of the week selectable in six languages)
    Regular timekeeping:
    Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)
    Digital: Hour, minute, second, pm, month, date, day
  • Run time
    Approx. battery operating time:
    7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Stopwatch
    1/100-second stopwatch
    Measuring capacity:
    00'00''00~59'59''99 (for the first 60 minutes)
    1:00'00~23:59'59 (after 60 minutes)
    Measuring unit:
    1/100 second (for the first 60 minutes)
    1 second (after 60 minutes)
    Measuring modes: Elapsed time, lap/split time
  • Timer
    Countdown timer
    Measuring unit: 1 second
    Countdown range: 60 minutes
    Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)
  • World time
    World time
    38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
User Manual – Module 5689

Feature List

  • Black icon of a watch hitting a flat surface with motion lines indicating a shock or impact.

    Shock resistant

  • Black icon of a person snorkeling with the number 20, representing a 20-bar pressure rating for water resistance.

    20 bar water resistant

  • Minimalist black icon of a person walking next to a simple clock face, representing punctuality or time management.

    Keeps yourself in time

  • Black icon of a smartwatch charging via solar energy with a battery level indicator and sun rays.

    Stable solar power

  • Black and white icon of a smartphone syncing time with an analog wristwatch via a wireless connection.

    Easy to operate via smartphone

  • Minimalist black and white icon of a person checking a glowing watch under a crescent moon at night.

    Easy to see in darkness
  • 5 stars: 0 (0%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (100%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
MT
Slightly above average - there are better 2100's out there

The GA-B2100MF-1A is a solid everyday G-Shock that nails comfort and wearability, but it’s let down by a few usability issues that stop it from being great.

Pros

Very comfortable on the wrist, easy to wear all day
Clean, simple dial with excellent hand visibility
Lightweight without feeling cheap
Classic “Casioak” styling works with almost anything

Cons

No automatic backlight activation, which feels like a step backwards
Backlight itself is fairly weak and not very useful in low light
Negative digital display is hard to read unless lighting is perfect
Buttons are small and a bit fiddly, could definitely be larger

Verdict
If you’re after a tough, good-looking everyday watch with great analogue readability, this does the job. But if you rely on the digital functions or often use the light, you’ll likely find it frustrating.
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