GA-100-1A2ER Watch

The Watch
Meet the latest addition to Casio's G-Shock lineup - a sport-auto timepiece built to perform. Multifunctional and ultra-tough, this watch features a striking tachymeter and a dual analog-digital display. Bold yet refined, this G-Shock works on any wrist: its black case with blue accents pairs effortlessly with virtually any outfit. Packed with features and built to last, it houses a resin case measuring 51 mm in diameter and 14 mm thick, topped with a scratch-resistant mineral crystal and equipped with 4 pushers. The stainless steel case back is secured with screws.

The Dial
The round black-and-blue dial features a stunning matte guilloché finish and dual display - analog for timekeeping and digital for additional functions. Hours and minutes are marked by indices and a blue minute track. Two central hands and the tachymeter hand at 12 o'clock are blue with a perforated finish, a tribute to the steering wheels of classic racing cars.

Features:

Automatic Calendar
Once set, the automatic calendar always displays the correct date.

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

Stopwatch Function - 1/1000 sec - 100 h
Measures elapsed time to 1/1000th-second precision over a maximum duration of 100 hours. An audible signal confirms the start and stop of the stopwatch.

Countdown Timers - 1/1 min - 24 Hours
For those who value precision: countdown timers alert you to important or recurring events with an audible signal at your programmed date and time. Time can be set in minutes, up to 24 hours in advance - ideal for daily medication reminders or recurring training sessions.

Automatic LED Backlight
To light up the watch display using the LED, simply tilt your wrist slightly.

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

Speed Display
Calculate your average speed over a set distance: simply enter the distance, then start the chronograph at the beginning and stop it at the end - your average speed appears on screen.

Anti-Magnetic
The case is engineered to resist magnetic fields.

Daily Alarm
The daily alarm goes off every day at the time you set. The value shown indicates the number of daily alarms available.

Snooze Function
Each time you silence the alarm, it will go off again a few minutes later.

Button Beep On/Off
The button beep can be turned off using the mode button. Once disabled, there is no longer a beep when switching between functions. However, any programmed alarms or countdowns remain active after the button beep has been turned off.

12/24-Hour Time Format
Display the time in either 12-hour or 24-hour format.

2 Years - 1 Battery
The battery powers the watch for approx. 2 years.

The Strap
This watch comes with a black resin strap and a silver-toned double-lock pin buckle. Thanks to its exceptional durability and flexibility, synthetic resin is an ideal material for watch straps.

Water Resistance
With water resistance up to 200 meters - or 20 ATM in the precise language of watchmaking - this watch is built for recreational diving. It can handle everyday water exposure including showers, baths, and swimming in the ocean or pool during shallow, non-professional dives (free diving). For professional scuba diving with tanks, our Ocarat watchmaking team has handpicked 30 ATM models available in our catalog. One final note: never operate the pushers or crown while in the water.