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Casio G-Shock Gravity Master Watch GR-B100-1A4DR

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Buy Casio G-Shock Gravity Master Watch GR-B100-1A4DR


Casio G-Shock Gravity Master Watch GR-B100-1A4DR is a new timepiece that delivers a high level of toughness. The watch is designed for severe environments and offers a shock-resistant structure that protects it from external shocks. The Tough Solar watch comes with a Double LED light (Super Illuminator) light for the face and for digital display, allowing you to read time under all lighting conditions. The watch is solar-powered and offers 200m water resistance. Other specs of the watch include Neobrite, Resin band and case, Stainless steel bezel, Shock resistance, 39 time zones, Mobile link (Wireless linking using Bluetooth), ±15 seconds per month accuracy and 6 months usage on a rechargeable battery. 


  • Case / bezel material: Resin / Stainless steel
  • Resin Band
  • Neobrite
  • Shock Resistant
  • Mineral Glass
  • 200-meter water resistance
  • Solar powered
  • Double LED light
    LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
  • Mobile link (Wireless linking using Bluetooth®)
  • World time
    39 time zones (39 cities + coordinated universal time), one-touch UTC time zone, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
    *May be updated when connected to a smartphone.
  • 1/1000-second stopwatch
    Measuring capacity:
    0000"000~5959"999 (for the first 60 minutes)
    1:0000"0~23:5959"9 (after 60 minutes)
    Measuring unit:
    1/1000 second (for the first 60 minutes)
    1/10 second (after 60 minutes)
    Measuring modes: Elapsed time, split time
  • Countdown timer
    Measuring unit: 1/10 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 second to 24 hours (1-second increments and 1-hour increments)
  • 5 multi-function alarms (with countdown, daily, 1 time, schedule)
  • Hourly time signal
  • Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents)
  • Battery level indicator
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
  • Regular timekeeping
    Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 1 dial (countdown indicator)
    Digital: Hour, minute, second, pm, month, date, day
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Approx. battery operating time:
    6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Size of case : 62.5×53.8×17.3mm
  • Total weight : 87g
  • Direct Import - This product is an international version. Learn more
  • Shock Resistant, Mineral Glass
  • 200-meter water resistance, Solar powered
  • Mobile link (Wireless linking using Bluetooth)

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