The GA2100RC-1A is part of the 'Black & Rust Colour' collection, showcasing the remarkable toughness of G-SHOCK watches. It mimics the look of aged metal over time. With a 48.5 × 45.4 × 11.8mm case size and weighing only 51g, it's both compact and lightweight. The carbon/resin case and bezel, along with a resin band, ensure durability. It's shock-resistant, thanks to the Carbon Core Guard structure, and can withstand water up to 200 meters. The battery lasts about 3 years with SR726W X 2. The mineral glass provides clear visibility. It offers world time for 31 time zones (48 cities + coordinated universal time), daylight saving on/off, a stopwatch, timer, alarm/hourly time signal, double LED light, and a full auto-calendar until 2099. There's also a mute feature for button operation tones. It has an accuracy of ±15 seconds per month. Other features include a 12/24-hour format, a hand shift feature for an unobstructed digital display view, and regular timekeeping with analog 2 hands (hour, minute moving every 20 seconds) and 1 dial (day), and digital hour, minute, second, pm, month, date.
Using your Casio G-Shock GA2100RC-1 watch is easy. To set the time, you can use the buttons on the side of the watch. For world time, just select the time zone you want. The stopwatch and timer are useful for tracking activities. To turn on the double LED light, press the corresponding button. The alarm can be set to wake you up or remind you of important events. When it comes to the mute feature, you can choose to turn off the button operation tone. As for maintenance, keep it away from extreme temperatures and strong magnetic fields. Wipe it with a soft cloth to keep it clean. If you're going swimming or diving, make sure the watch is properly sealed. And when the battery runs out after about 3 years, take it to a professional to replace it.
