Casio G-Shock [GA-100WD-1ADR]

Dimensions & Build

• Case Size: 55 × 51.2 × 16.9 mm
• Weight: 72 g
• Material: Resin case, bezel, and band
• Glass: Mineral Glass with Neobrite (low-light visibility)
• Band Size: 145–215 mm
• Water Resistance: 200 meters
• Shock & Magnetic Resistance: Yes

Power & Battery

• Battery Type: CR1220
• Battery Life: Approximately 2 years

Key Features

• World Time: 29 time zones (48 cities + UTC), daylight saving on/off, home city/world time swapping
• Stopwatch:
  • Precision: 1/1000-second
  • Capacity: 99:59'59.999''
  • Modes: Elapsed time, lap time, split time
  • Speed Measurement: 0–1998 units/hour
  • Distance Input: 0.0–99.9
  • Mach Indicator: Detects speeds exceeding 1225 units/hour
• Countdown Timer:
  • Range: 1 minute to 24 hours
  • Increments: 1-minute and 1-hour
  • Functionality: Auto-repeat
• Alarms: 5 daily alarms (with snooze) + hourly signal
• Lighting: Amber LED, selectable (1.5/3 seconds), auto light switch, afterglow
• Calendar: Full auto-calendar (to year 2099)

Timekeeping & Accuracy

• Display:
  • Analog: 2 hands (hour, minute) + speed dial
  • Digital: Hour, minute, second, month, date, day
• Time Format: 12/24-hour
• Accuracy: ±15 seconds per month