Casio - G-Shock World Time Alarm GA-100-1A2 GA-100 Men's Watch - Black
Reviews coming soon
About this product
The Casio G-Shock World Time Alarm GA-100-1A2 GA-100 Men’s Watch is built for tough, everyday performance with bold style. Its shock-resistant resin case and strap house reliable quartz movement and an easy-to-read analog-digital display. World time, multiple alarms, stopwatch, and countdown timer keep your schedule on track whether you are traveling, training, or on the job. The large, rugged case and striking color accents give it a modern, sporty look that pairs well with casual or active wear. With 200M water resistance, this G-Shock is ready for swimming, sports, and all-weather adventures.
Shock-Resistant G-Shock Construction
Built with Casio’s renowned G-Shock structure, the GA-100-1A2 is engineered to withstand strong impacts, drops, and rough handling. Its rugged resin case and bezel protect the internal module, making it ideal for sports, outdoor activities, and demanding daily use.
World Time with 48-City Coverage
The world time function lets you view the current time in major cities and time zones around the globe. Quickly switch between home and world time, making it especially useful for travelers, remote workers, and anyone coordinating across different regions.
1/1000-Second Stopwatch and Speed Indicator
A high-precision 1/1000-second stopwatch supports detailed time measurement for training, laps, and performance tracking. The integrated speed indicator can calculate approximate speed over a measured distance, offering extra utility for runners, cyclists, and other athletes.
Multiple Alarms, Countdown Timer, and Full Auto-Calendar
Four daily alarms plus one snooze alarm help you manage appointments, reminders, and training schedules. A countdown timer supports interval timing and event preparation, while the full auto-calendar is pre-programmed, so date displays stay accurate without manual adjustments.
Distinctive Analog-Digital Display with Blue Accents
The combination analog-digital layout provides quick, at-a-glance reading of time alongside detailed digital data on sub-displays. Striking blue accents against the black dial enhance legibility and give the watch a bold, modern aesthetic that stands out on the wrist.
- BrandCasioModel NumberGA-100-1A2Product NameG-Shock World Time Alarm GA-100-1A2 GA-100 Men's WatchColorBlackCase Thickness16.9 millimetersCase Size55mm
Reviews
This product doesn't have any reviews yet.
Compare similar products

The Casio G-Shock World Time Alarm GA-100-1A2 GA-100 Men’s Watch is built for tough, everyday performance with bold style. Its shock-resistant resin case and strap house reliable quartz movement and an easy-to-read analog-digital display. World time, multiple alarms, stopwatch, and countdown timer keep your schedule on track whether you are traveling, training, or on the job. The large, rugged case and striking color accents give it a modern, sporty look that pairs well with casual or active wear. With 200M water resistance, this G-Shock is ready for swimming, sports, and all-weather adventures.

The Casio G-Shock MUDMASTER Twin Sensor GG-1000-1A Men's Watch is built for harsh environments while remaining practical for everyday wear. Its shock, mud, and vibration resistant construction protects a precise quartz movement and easy-to-read analog-digital display. Twin sensor technology provides reliable direction and temperature readings, ideal for outdoor, tactical, or field use. With 200M water resistance, it is suitable for swimming, snorkeling, and rugged adventures. Bold indices, large buttons, and a robust resin case deliver a strong, masculine style that pairs well with casual or work gear, offering dependable Master of G performance with low-maintenance convenience.

The Casio G-Shock Analog Digital Smartphone Link GA-B2100BEG-1A fuses bold style with everyday practicality. Its modern 2100 silhouette in stealthy black is energized by electro green accents for sharp legibility. Built with a Carbon Core Guard case and bio based resin band, it’s lightweight yet tough, backed by 200 meter water resistance and mineral glass. Tough Solar power and Bluetooth Smartphone Link keep time precise with minimal effort. World time, stopwatch, countdown timer, multiple alarms, and calendar streamline busy schedules, while LED illumination, Neobrite coating, and a slim, comfortable profile make it ideal for daily wear and travel.

The G-Shock Neon Accent Analog Digital Quartz GA-2100-1A2 Men's Watch combines rugged durability with a bold design. Featuring a black dial with neon accents, it offers both analog and digital timekeeping for added versatility.
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.


































