Casio G-Shock Hidden Glow Series GA-2100HD-8A Gray Bio-Based Resin Band Men Sport Watch

Unlock your full potential, and bring what’s hidden to the fore. Introducing the G-SHOCK that glows in the dark.

This line features luminescent parts set against a dark gray base — a design inspired by the hidden talents we each have, but rarely reveal.

We start with a base of gray to evoke the dark, then add luminescent components and white accents to the face, creating a monochromatic watch with an extra special glow.

Search out a dark space and watch this cool design come to life in glowing luminescence.

• Case size (L× W× H): 48.5 × 45.4 × 11.8 mm

• Weight: 51 g

• Case and bezel material: Carbon / Bio-based resin

• Band: Bio-based resin band

• Construction:

  Shock Resistant

  Carbon Core Guard structure

• Water resistance: 200-meter water resistance

• Power supply and battery life: Approx. battery life: 3 years on SR726W X 2

• Glass: Mineral Glass

• Compatible band size: 145 to 215 mm

• Other: Neobrite

• World time:

  World time

  31 time zones (48 cities + coordinated universal time), daylight saving on/off

• 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

• 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)

• Alarm/hourly time signal:

  5 daily alarms

  Hourly time signal

• 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)

• Light color: LED:White

• Calendar: Full auto-calendar (to year 2099)

• Mute feature: Button operation tone on/off

• Accuracy: ±15 seconds per month

• 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