CASIO G-SHOCK: GD100-1B Digital Watch

Built around the oversized face of the GA100 series, the GD-100-1B delivers all-digital functionality wrapped in G-Shock toughness. Its matte black resin case and band provide a bold, no-nonsense look that stands up to any environment. An oversized front button activates the high-intensity LED backlight instantly, ensuring you read every data point even in total darkness. Whether you’re tracking world time, timing laps or setting alarms, this watch handles every demand—day after day, year after year.

Features

• Carbon Core Guard Structure: Resin case reinforced with carbon-fibre insert resists shocks, cracks and impacts—protecting the module when every second counts.

• High-Intensity LED Backlight (Super Illuminator): One-touch LED illuminates the large digital display for clear readability in darkness or glare; selectable illumination duration (1.5 s/3 s) with afterglow.

• World Time (31 Zones): Displays current time in 48 cities plus Coordinated Universal Time (UTC), with daylight-saving on/off and home/world city swapping—perfect for travellers and shift-workers.

• 1/100-Second Stopwatch & Countdown Timer: Precision stopwatch measures up to 23:59’59.99″ (elapsed time, split time, 1st/2nd place times); countdown timer ranges 1 minute to 24 hours (1-second, 1-minute and 1-hour increments) with progress beeper.

• Five Daily Alarms & Hourly Time Signal: Program up to five one-time or daily alarms (including one snooze alarm) and an hourly chime to stay on schedule without second-guessing.

• Flash Alert: LED flash and buzzer signal for alarms, hourly time signal, countdown timer completion and stopwatch target time—ensuring you never miss critical notifications.

• Full Auto-Calendar (to 2099): Pre-programmed calendar automatically adjusts for date, month and leap years—eliminating manual date setting.

• 200-Metre Water Resistance: Rated to 20 bar, this watch endures deep dives, heavy rain and sudden immersion—keeping you mission-ready underwater or on land.

• Auto LED Backlight with Afterglow: Automatically illuminates the display in low light when you tilt your wrist toward your face—ideal for hands-free operation.

Case size: 51 × 51 × 17 mm

Water resistance: 200 m (20 bar)

Case/bezel material: Resin (Carbon Core Guard)

Band material: Resin (black)

Crystal: Mineral glass

Movement: Japanese quartz (Module 3263)

Battery life: Approx. 7 years on CR2025

Accuracy: ± 15 seconds / month

Functions: World time (31 zones); 1/100-second stopwatch; countdown timer (1 sec–24 hrs); five one-time/daily alarms; hourly time signal; flash alert; full auto-calendar; 12/24-hr format; auto LED backlight

Weight: 72 g

Colour: Black

Stay on time in any environment—add the G-Shock GD-100-1B to your kit today and experience unwavering reliability from a watch that professionals trust.