The Casio GA-100-1A4ER G-SHOCK Men’s Watch is engineered for ultimate durability, combining shock resistance, anti-magnetic structure, and 200m water resistance in a bold, tactical design. Designed with oversized anti-slip buttons for ease of use even in extreme conditions, this timepiece is the perfect companion for active lifestyles—from professional sports to outdoor survival and urban adventure.
Engineered to Withstand Extreme Conditions Whether you're snowboarding, skating, diving, or pushing your limits in any field, the G-SHOCK GA-100-1A4ER is made to endure. The shock-resistant structure and anti-magnetic casing ensure uninterrupted performance in harsh environments.
Multifunction Analog-Digital Display This hybrid design combines analog hands with digital timekeeping for high visibility and precision. With world time, a 1/1000-second stopwatch, countdown timer, and full auto calendar, this watch supports a busy and mobile lifestyle.
Smart Alerts and Backlight Visibility Stay on track with 5 daily alarms including 1 with snooze, and use the bright backlight for quick viewing in low light or complete darkness.
Water Resistant up to 200m Ready for serious water exposure, the GA-100-1A4ER is suitable for swimming, snorkelling, and even free diving without equipment.
Key Features
Shock-resistant G-SHOCK structure
Analog-digital hybrid display
Anti-magnetic construction for precision
World time with 29 time zones and 48 cities
Stopwatch 1/1000 sec, 100 hours
Countdown timer 1/1 min, 24 hours with auto repeat
5 daily alarms and 1 snooze alarm
Backlight for visibility in the dark
Full auto calendar and 12/24-hour formats
Scratch-resistant mineral crystal glass
200m water resistance
Oversized anti-slip buttons for easy handling
Specifications
Brand: Casio
Model: GA-100-1A4ER
Style: Sport / Tactical
Display: Analog-Digital
Movement: Quartz
Case Material: Acrylic
Case Color: Black
Case Size: Small
Case Diameter: 51 mm
Case Thickness: 17 mm
Dial Color: Multicolour
Dial Window Material: Mineral
Band Material: Resin
Band Color: Black
Band Width: 18 mm
Band Size: Men’s Standard
Bezel Material: Resin
Bezel Function: Stationary
Clasp Type: Buckle
Calendar: Day-Date-Month-Year
Special Features: Alarm, Light, Stopwatch, Countdown Timer, World Time
Water Resistance: 200 meters (20 bar)
Watch Shape: Round
Metal Stamp: 10k
Model Year: 2010
Unit Count: 1 count
Number of Items: 1
Dimensions: 20 x 20 x 20 cm
Weight: 0.35 g
Directions of Use
Unbox the watch and remove protective packaging
Use the manual to configure local time, alarms, and modes
Access stopwatch and timer via the mode button
Use backlight button to illuminate screen in darkness
Ensure crown and buttons are properly secured before water exposure
Validate your login