The Casio CTK-2100 offers pure playing pleasure with 61 piano-style touch keys. Whether you want to dive into a colorful world of 150 rhythms, use the sampling function together with the voice pads, or connect a CD or MP3 player through the audio input so that you can play along to your favorite song on the keyboard, this Casio keyboard provides a huge range of features and functions. Dubbed the 'CasiOak', the GA-2100 Octogan series is the slimmest G-SHOCK ever. The GA-2100 has an octagonal case, another departure from the brand’s signature style.

The new G-Shock GA-2100 is likely the most wearable in the line-up, being the thinnest G-Shock ever. Its compact dimensions – and analogue hands – gives it the feel of a conventional watch, avoiding the extremely oversized style of many G-Shocks.

Casio G Shock 2100

Just 11.8mm high, the GA-2100 is thinner than the Omega Speedmaster Moon Watch (13mm) and the Rolex Daytona (12.2mm). The case diameter is 45.4mm, though it looks and feels substantially smaller.

G-Shock inventor Kikuo Ibe at the launch of the GA-2100 in Singapore

Though reduced in size, the GA-2100 has the traditional G-Shock case construction that includes an inner protective bumper around the electronic module.

Visible around the steel case back, the bumper is made of carbon composite – which Casio has named the Carbon Core Guard – which is a dark marbled grey and distinct from the black resin outer case.

The octagonal bezel is immediately reminiscent of the Royal Oak, but according to Casio it is actually a reworking of the bezel of the original G-Shock of 1983, the DW-5000C, which was octagonal, albeit one with unequal sides.

The GA-2100 has an analogue displays for the time and day of the week, but also all the usual electronic functions of a G-Shock in two LCD windows, including multiple time zones, stopwatch, alarm, countdown and calendar.

Key facts and price

Diameter: 45.4mm
Height: 11.8mm
Material: Resin and carbon composite with steel back
Water resistance: 200m

Movement: 5611
Functions: Multi-function electronic with analogue time display
Winding: Quartz

Battery life: 3 years

Strap: Resin

Price: US$99, or 169 Singapore dollars.

The GA-2100 is already available at G-Shock stores and retailers.

What’s New in G Shock GA 2100

August 2019, G-Shock released one of the coolest models, the G Shock GA 2100. In this article, you will see the key features of the GA-2100 series.GA-2100 is a Carbon Core Guard Model Same as G-Shock GA-2000. If we see what’s new GA-2100 is the first Slimmest watch with octagon bezel shape. These new models inherit the octagon form that was also employed for the original DW-5000C. if we see the standard feathers GA2100 Series is shock resistance, Double LED Light, Mineral Glassonly new Feather is Carbon Core Guard Technology.

GA 2100 Color Variations:

GA-2100 Series comes with three colors .

• GA-2100-1ADR
• GA-2100-1A1DR
• GA-2100-4A

G-Shock GA 2100 1ADR

GA-2100-1ADR is a black Model along with white Hands .

GShock GA2100 On amazon

G Shock GA 2100 1A1DR

GA-2100-1A1DR is a black Models along with Black Hands .

Casio GA 2100 4ADR

GA-2100-4ADR is a Red Models along with Red Hands .

Casio GA-2100 Prices.

Each model has a list price of 13,500 JPY along with tax.

Specification of GA 2100

• Case / bezel material: Carbon / Resin　
• Resin Band
• Mineral Glass
• Shock Resistant
• Carbon Core Guard structure
• 200-meter water resistance

• 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)
• World time
  31 time zones (48 cities + coordinated universal time), daylight saving on/off
• 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
• 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)
• 5 daily alarms
• Hourly time signal
• Hand shift feature
• Full auto-calendar (to year 2099)
• 12/24-hour format
• Button operation tone on/off
• Regular timekeeping
  Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)
  Digital: Hour, minute, second, pm, month, date
• Accuracy: ±15 seconds per month

Battery Life

Approx. battery life: 3 years

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How to Set Time in GA-2100

If you want to set the time just Click here

Promotional Video

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G-Shock GA-2100 On Amazon