G-Shock GA-B2100-1A1ER Watch

The Watch

If you're after a bold, sport-oriented timepiece with cutting-edge technology, look no further. Meet the G-Shock GA-B2100-1A1ER watch by Casio G-Shock - crafted for every men's wrist that values reliability and precision. The case is built from carbon for exceptional shock resistance, topped by a mineral crystal chosen for its durability. Dimensions are 48.5 mm x 45.5 mm x 11.9 mm (length, diameter, and thickness). Pushers let you adjust the hands and navigate the watch's many functions with ease. Water-resistant to 20 ATM, you can keep it on your wrist for your diving sessions. And this piece of jewelry tips the scales at just 52 grams.

The Dial

Round and black in color, this strikingly sleek dial makes reading the time effortless. At its center, two thick gray hands with black-outlined edges stand out clearly, allowing you to tell the hours and minutes at a glance using the twelve indexes or the minute track. These elements feature Neobrite luminescent technology, so they glow in the dark for easy readability in any lighting condition. The result: analog time display in every situation. A digital window is also built into the dial, giving you access to all the watch's functions. This window is complemented by a day-of-the-week counter positioned at the nine o'clock mark. Finally, Casio G-Shock proudly displays its name in gray lettering just below the twelve o'clock index.

Features

5 Daily Alarms
An audible alarm reminds you of your daily commitments at the programmed time. This model features five independent alarms for maximum flexibility in keeping track of your important appointments.

Super Illuminator
A single press of a button illuminates the dial in vibrant, on-trend colors.

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

12/24-Hour Time Format
You can display the time in either 12-hour or 24-hour format.

Multi-Language Day Display
The day of the week can be displayed in multiple languages of your choice.

Button Tone On/Off
The button tone can be disabled using the mode button. Once deactivated, no beep sounds when switching between functions. However, any programmed alarms or countdowns remain active even after the button tone has been turned off.

Hand-Shift Function
This function moves the hands out of the way when they obstruct the visibility of the time, date, or stopwatch display.

Phone Finder Function
Misplaced your smartphone? Simply press one of the watch's buttons to trigger an alarm on your phone.

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

Bluetooth® Smart
The watch features energy-efficient Bluetooth® technology that enables data exchange at the press of a button. The Bluetooth® function wirelessly connects the watch to a smartphone, unlocking a wide range of highly practical features.

Smartphone Time
When the watch is paired with a smartphone, the time is set automatically and displays the current local time anywhere in the world.

Stopwatch - 1/100 sec - 24 Hours
Measures elapsed time with 1/100th-of-a-second precision for up to 24 hours. An audible signal confirms the start and stop of the stopwatch.

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

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

The Movement

At the heart of this case sits a discreet yet highly efficient solar movement. Reliable, precise, and built to the highest standards, this mechanism will keep perfect time - day after day.

The Strap

Timeless and elegant, this watchmaker chose a stunning black strap to complete this model. Its understated style pairs effortlessly with any outfit, making it easy to wear every day. Crafted from resin, it offers flexibility and lightness on the wrist. Fastening and removing it is a breeze thanks to its tang buckle. One last detail about this fine strap: its lug width measures 26 millimeters.

Water Resistance

With 200-meter water resistance, or 20 ATM in proper watchmaking terms, this watch is built for recreational diving. It can handle the shower, the bath, the ocean, and the pool for non-professional freediving. For professional scuba diving with tanks, our Ocarat watch team has curated a dedicated selection of 30 ATM models available on the site with an additional search. One final reminder before we let you go: never operate the pushers or crown during water activities!