G-SHOCK

GA2100HDS-7A

Archive model

This product is no longer available for purchase.

Take your inspiration from the summer seas, with the white and blue G-SHOCK.

The watch’s blue phosphorescent face glows magically at night, evoking the shimmer of bioluminescent plankton floating in the sea. Paired with a white and blue colour scheme, the design beautifully captures the beach’s dynamic transformation from the brilliance of the daylight sun to soft nighttime hues.

Shimmery sea-inspired styles flow easily from casual settings to work situations.

Basic Information
  • Band
    Bio-based resin band
  • Case and bezel material
    Carbon / Bio-based resin
  • Case size (L × W × H)
    48.5 × 45.4 × 11.8 mm
  • Construction
    Shock Resistant, Carbon Core Guard structure
  • Power supply and battery life
    Approx. battery life: 3 years on SR726W X 2, Approx. battery life: 3 years on CR1025
  • Water resistance
    200-metre water resistance
  • Weight
    51 g

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

Features
  • Accuracy
    Accuracy: ±15 seconds per month
  • Alarm / hourly time signal
    5 daily alarms
    Hourly time signal
  • Calendar
    Full auto-calendar (to year 2099)
  • 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
    12/24-hour format
    Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
    Regular timekeeping:
    Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)
    Digital: Hour, minute, second, pm, month, date
    Analog: 2 hands (hour, minute (hand moves every 20 seconds))
    Digital: Hour, minute, second, pm, month, date, day
  • 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, split time, 1st-2nd place times
    Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
    Measuring unit: 1/100 second (for the first 60 minutes)
  • Timer
    Countdown timer
    Measuring unit: 1 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
  • World time
    World time
    31 time zones (48 cities + coordinated universal time), daylight saving on/off
User Manual – Module 5611

G-SHOCK watches with a blue phosphorescent face inspired by the ocean at night

The white and blue color scheme evokes the summer sea, while the blue phosphorescent face captures the magical glow of bioluminescent plankton under the sea at night. Each watch’s distinctive dial design highlights the changing beauty of the beach, shifting from bright daylight to soft nighttime hues. The interplay of color and light enhances the unique character of each piece in the lineup.

G-SHOCK Hidden Glow Series Vol2

Blue phosphorescent face inspired by the enchanting glow of bioluminescent plankton

Each model’s dial incorporates resin components imbued with phosphorescent material, applied either across the entire surface or in select areas. In darkness, it emits a gentle blue glow, beautifully highlighting the unique face design of each watch in a striking silhouette.

* The GA-2100HDS (left) and the GA-110HDS (right) are shown in the first image, and the GA-700HDS (left) and the DW-6900HDS (right) in the second.

LED light for maintaining watch readability in the dark

GA-2100HDS (left in the image): Dial and LCD (Super Illuminator)
GA-110HDS (right in the image): Dial

Attention to materials: Bio-based resin

Key resin components used in the bezel and band are made with bio-based resin, a material expected to help reduce environmental impact.

* Image is included for illustrative purposes.

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

    Easy to see in darkness

Shop G-SHOCK Hidden Glow Series Vol2

Compare models

Compare key specifications across models in this collection.

G-SHOCK-DW6900HDS-7D-Watches-CASIO Australia
DW6900HDS-7A1
View details
G-SHOCK-DW6900HDS-7A1-Watches-CASIO Australia
DW6900HDS-7D
View details
G-SHOCK-GA110HDS-7A-Watches-CASIO Australia
GA110HDS-7A
View details
G-SHOCK-GA2100HDS-7A-Watches-CASIO Australia
GA2100HDS-7A
View details
G-SHOCK-GA2100HDS-7A1-Watches-CASIO Australia
GA2100HDS-7A1
View details
Price
Price
$259.00
$259.00
$299.00
$299.00
$299.00
Case size (L × W × H)
Case size (L × W × H)
53.2 × 50 × 18.7 mm
53.2 × 50 × 18.7 mm
55 × 51.2 × 16.9 mm
48.5 × 45.4 × 11.8 mm
48.5 × 45.4 × 11.8 mm
Weight
Weight
67 g
67 g
72 g
51 g
51 g
Water resistance
Water resistance
200-metre water resistance
200-metre water resistance
200-metre water resistance
200-metre water resistance
200-metre water resistance
Band
Band
Resin Band
Resin Band
Resin Band
Bio-based resin band
Bio-based resin band
Glass
Glass
Mineral Glass
Mineral Glass
Mineral Glass
Mineral Glass
Mineral Glass
Power supply and battery life
Power supply and battery life
Approx. battery life: 5 years on CR2016
Approx. battery life: 5 years on CR2016
Approx. battery life: 2 years on CR1220
Approx. battery life: 3 years on SR726W X 2, Approx. battery life: 3 years on CR1025
Approx. battery life: 3 years on SR726W X 2, Approx. battery life: 3 years on CR1025
Accuracy
Accuracy
Accuracy: ±15 seconds per month
Accuracy: ±15 seconds per month
Accuracy: ±15 seconds per month
Accuracy: ±15 seconds per month
Accuracy: ±15 seconds per month
World time
World time
—
—
World time
29 time zones (48 cities + coordinated universal time), daylight saving on/off, home city/world time city swapping
World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off
World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off
Stopwatch
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, split time, 1st-2nd place times
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, split time, 1st-2nd place times
1/1000-second stopwatch
Measuring capacity: 99:59'59.999''
Measuring modes: Elapsed time, lap time, split time
Others: Speed (0 to 1998 units/hour), distance input (0.0 to 99.9)
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, split time, 1st-2nd place times
Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
Measuring unit: 1/100 second (for the first 60 minutes)
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, split time, 1st-2nd place times
Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
Measuring unit: 1/100 second (for the first 60 minutes)
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