Casioak Pink Jellyfish


Slip on a splash of clear metallic pleasure with the ever-popular analog-digital combination GA-2100 in a slimmer, more compact profile. Metallic translucent designs in a choice of colors for versatile watches that pair with any outfit, all year round. Index markings treated with a half-matte vapor deposition finish bring to life the clear metallic look.

  • Case size (L× W× H)46.2 × 42.9 × 11.2 mm
  • Weight41 g
  • Case and bezel materialize / bezel material: Resin
  • BandResin Band
  • ConstructionShock ResistantCarbon Core Guard structure
  • Water resistance200-meter water resistance
  • Power supply and battery life approx. battery life: 3 years on SR726W X 2
Model NumberGMAS2100SK4A
Watch BrandCasio
Watch StyleWrist
Watch Display TypeAnalog
Watch Power SourceReplaceable Battery
Watch Band StyleStrap
Watch Band ColorPink
Watch Band MaterialResin / Plastic
Watch Clasp TypeBuckle
Watch Case Size42
Watch Dial ColorPink
Watch BezelSmooth Bezel
Watch Crystal TypeMineral
Watch ThemeFashion
Watch FeaturesStop Watch, Alarm, Multiple Time Zones, Date, Backlight, Shock Resistant, Water Resistant



FORMAT 12/24-hour
ANALOG TIMEKEEPING 2 hands (hour, minute), 1 hand (day)
DIGITAL TIMEKEEPING Hour, minute, second, pm, month, date
WORLD TIME 31 time zones (48 cities + coordinated universal time), daylight saving on/off
ALARM 5 daily alarms
TIME SIGNAL Hourly time signal
CALENDAR Full auto-calendar (to year 2099)


RANGE 24 hours
START TIME SETTING RANGE 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)


CAPACITY 1/100-second
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


TYPE 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


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