Casio G-Shock Gravity Master [GR-B300EC-1ADR]

Case size (L×W×H): 59 × 54.7 × 15.7 mm
Weight: 71 g
Case and bezel material: Bio-based Carbon / Bio-based resin / Stainless steel
Band: Bio-based resin band
Construction: Shock Resistant, Carbon Core Guard Structure
Water resistance: 200-meter water resistance

Time adjustment:

• Bluetooth: Connects to a smartphone for automatic time adjustment

Power supply and battery life:

• Tough Solar (Solar powered)

Smartphone Link/App Connectivity Features:

• Mobile link: Wireless linking via Bluetooth®
• Apps: CASIO WATCHES
• App connectivity features:
  • Auto time adjustment
  • Easy watch setting
  • Approximately 300 world time cities
  • Flight log
  • Phone finder

Exterior:

• Glass: Mineral Glass
• Crown: Screw Lock Crown
• Surface treatment: Black ion-plated bezel
• Compatible band size: 145 to 215 mm
• Other: Neobrite

Watch Features:

• World time: Dual time with Home City swapping
• Stopwatch:
  • 1-second stopwatch
  • Measuring capacity: 23:59'59
  • Measuring modes: Elapsed time, split time
• Timer:
  • Countdown timer
  • Measuring unit: 1 second
  • Countdown range: 24 hours
  • Countdown start time setting: 1 minute to 24 hours (1-minute and 1-hour increments)
• Alarm: Daily alarm
• Light: LED light (Super Illuminator) with afterglow
• Light color: White
• Calendar: Full auto-calendar (to the year 2099)

Energy saving feature:

• Power Saving (hands stop to save power in the dark)

Battery display/alert:

• Battery level indicator

Run time:

• 5 months on rechargeable battery (normal use without light exposure)
• 18 months on rechargeable battery (in darkness with power-saving mode)

Accuracy: ±15 seconds per month (without mobile link function)

Other features:

• Date display
• Day indicator
• Regular timekeeping:
  • Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour/minute, dual time 24-hour, day)