Tone on Tone GA-2100-9A9ER Watch

The Watch

Casio is a renowned Japanese brand celebrated for its timeless, top-quality craftsmanship. Its timepieces blend a sporty aesthetic with cutting-edge technology - a dream for watch enthusiasts. Today, the brand proudly presents this stunning GA-2100-9A9ER from its iconic G-Shock collection. A perfect fusion of functionality and style, it's built to keep up with every adventure. Its octagonal case is crafted from green durable resin - bold and full of character - measuring 45.40 mm in width, 48.50 mm in length, and 11.80 mm in thickness. The dial is protected by a flat mineral crystal. Four pushers positioned on either side of the case handle all function adjustments. The watch weighs 51 g and features a screw-down case back ensuring water resistance of 20 ATM.

The Dial

The dial on this beautiful watch is round and green. Clean and minimalist in design, it showcases two matching hands marking the hours and minutes, coated with a Neobrite layer for readability even in the dark. They point to 12 hour markers and a minute track. A digital window rounds out the display, giving you access to all the watch's features. The counter at 9 o'clock shows the day of the week in abbreviated English. Finally, the brand places the collection name and its own name at 12 o'clock.

The Functions

LED Illumination

The watch dial is illuminated by an LED.

Shock Resistance

The shock-resistant structure protects the watch against impacts and vibrations.

Neobrite Coating

The hands and/or hour markers are coated with a fluorescent material that keeps glowing in the dark after the watch has been exposed to a light source.

World Time Function

The world time function displays the current time in 29 time zones and major cities around the world.

1/100-Second Stopwatch - 24 Hours

Measures elapsed time to 1/100th of a second for up to 24 hours. An audible signal confirms when the stopwatch starts and stops.

Countdown Timers - 1/1 sec - 24 Hours

Perfect for those who value precision: countdown timers alert you to important or recurring events with an audible signal at the set date and time. The timer can be programmed in seconds, up to 24 hours in advance.

5 Daily Alarms

A daily audible alarm reminds you of your commitments at the programmed time. This model features five independent alarms, giving you the flexibility to stay on top of all your important appointments.

Button Beep On/Off

The button beep can be turned off using the mode button. Once disabled, no beep will sound when switching between functions. However, any programmed alarms or countdowns remain active even after the button beep is turned off.

Hand Shift Function

This function lets you move the hands when they obstruct the visibility of the time, date, or stopwatch display.

Auto-Calendar

Once set, the auto-calendar always displays the correct date.

12/24-Hour Time Format

You can display the time in 12-hour or 24-hour format.

3 Years - 1 Battery

The battery powers the watch for approximately 3 years.

The Movement

At its core, this model houses a high-performance quartz movement - a highly reliable Japanese mechanism that delivers precise timekeeping and smooth operation of all built-in modes. It runs on a battery with an approximate 3-year battery life.

The Strap

You'll love this stunning green durable resin strap that completes this beautiful watch. Timeless and refined, it pairs effortlessly with any outfit - making it an easy everyday choice. Adjusting it to your wrist is a breeze thanks to its matching-color tang buckle.

Water Resistance

With 200-meter water resistance - or 20 ATM in proper watchmaker's terms - this watch is built for recreational water activities. It can handle showers, baths, and shallow-water swimming in the sea or pool (non-professional, breath-hold diving). For professional scuba diving with tanks, our Ocarat watch specialists have curated a selection of 30 ATM models available through a quick search on our site. One last reminder before we let you go: no pushing buttons or operating the crown during any water activity!