G-Shock GMA-S2100-4AER Watch

The Watch

Rugged and feature-packed, meet the GMA-S2100-4AER - Casio's latest statement in sports watchmaking. Casio's high-precision models have reshaped the industry, and this one is no exception. Weighing just 41 grams, it goes anywhere without slowing you down. Entirely beige, this ultra-tough watch features a resin case reinforced with carbon fiber. Its dimensions - 42.9 mm wide, 46.2 mm long, and 11.2 mm thick - deliver optimal legibility on the wrist. Four pushers at the corners let you navigate and activate the watch's many functions. A fixed resin bezel is engraved with "adjust," "light," "mode," and "start" for quick reference. "G-Shock" appears at 12 o'clock and "Protection" at 6 o'clock. A mineral crystal shields the dial from scratches and impacts. The screw-secured caseback ensures 20 ATM water resistance.

The Dial

The round dial in beige will win you over with its many features. At the center, two hands indicate the hours and minutes. Featuring a Neobrite coating, they ensure night readability thanks to their fluorescence. The dial also includes a minute railway track and baton-style indices. On the left, a sub-dial displays the day of the week via a small hand. On the right, a digital display is positioned. Finally, the brand signature can be read at 12 o'clock.

The Functions

Dual Illuminator: When the electroluminescent backlight activates, both the digital and analog areas of the dial light up.

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

Neobrite Coating: The hands and/or indices feature a fluorescent coating that keeps glowing in the dark after exposure to a light source.

World Time Function: Displays the time across 29 time zones and major cities worldwide.

1/100-Second Stopwatch - 24 Hours: Measures elapsed time with 1/100-second precision for up to 24 hours. A beep confirms the start and stop of the stopwatch.

Countdown Timers - 1/1 sec - 24 Hours: For those who love precision: countdown timers alert you to important or recurring events with an audible signal at the set date and time. Time can be programmed in seconds, up to 24 hours in advance.

5 Daily Alarms: An audible alarm reminds you of your schedule at the programmed time every day. This model features five independent alarms for maximum flexibility in tracking your important appointments.

Hand Shift Function: Moves the hands out of the way when they obstruct the time, date, or stopwatch display.

Button Tone On/Off: The button beep can be turned off using the mode button. Once disabled, no beep sounds when switching between functions - however, any programmed alarms or countdown timers remain active.

Auto Calendar: Once set, the auto calendar always displays the correct date.

12/24-Hour Time Format: Switch between 12-hour and 24-hour time display.

The Movement

A quartz movement powers this timepiece, offering easy readability with 2 hands and a digital display.

The Strap

The strap, matching the rest of the watch in beige, is made of resin. In addition to comfort and durability, its tang buckle lets you adjust the fit to your liking.

Water Resistance

With water resistance up to 20 atmospheres (200 meters), this model qualifies as a true dive watch. Our watchmaking experts agree: while it handles showers, baths, lap swimming, freediving, and recreational scuba with ease, it is not designed for extreme deep-sea diving where pressure would eventually exceed its limits. For professional divers taking on serious depth challenges, we recommend models rated at 30 ATM and above. We also advise against operating the pushers or crown while underwater to maintain a perfect seal.