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Casio

G-Shock Casio Master of G Air Gravitymaster Solar Connected Black Resin Strap Watch - GRB300-1A

  • Based on 23 reviews
Condition: New
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$239.00 Why this price?
Holiday Deal · 20% off was $300.00

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This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Dec 10
Order within 11 hours and 9 minutes
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Description

Inspired by next-generation aircraft design the GRB300-1A is a sophisticated and tough timepiece from the GRAVITYMASTER series.This watch features a Carbon Core Guard structure utilizing carbon fiber-reinforced resin for a case that is both lightweight and incredibly strong.Its seamless bezel design and wide triple-layered 3D face are crafted for enhanced readability mimicking a pilots cockpit instrument panel.This model is equipped with Tough Solar technology allowing it to charge from any light source and Mobile Link via Bluetooth for seamless smartphone connectivity.These features provide automatic time adjustment and easy watch settings for world time flight logs and more.Key resin components including the case bezel and band are made from bio-based resin a sustainable material produced from renewable organic resources.Shock Resistant.Tough Solar Power (solar-powered).200M Water Resistant.Carbon Core Guard Structure.Mobile Link (Wireless linking using Bluetooth).Case size- 59 x 54.7 mm.

Package Dimensions ‏ : ‎ 4.33 x 4.17 x 3.82 inches; 9.59 ounces


Item model number ‏ : ‎ GR-B300-1A


Department ‏ : ‎ mens


Date First Available ‏ : ‎ May 13, 2024


Manufacturer ‏ : ‎ Casio


Product Warranty: For warranty information about this product, please click here


Best Sellers Rank: #590,307 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #3,019 in Men's Wrist Watches


#3,019 in Men's Wrist Watches:


Customer Reviews: 4.5 4.5 out of 5 stars 23 ratings


Brand, Seller, or Collection Name: Casio


Metal: no-metal-type


Clasp: Buckle


Model number: GR-B300-1A


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Dec 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Hubby loves it!
Bought this for my husband. Very well made and the perfect size. He loves it! Uses it for work and personal usage.
Reviewed in the United States on October 23, 2025 by SheMyGo
    • Favorite G shock
Great watch
Reviewed in the United States on September 18, 2025 by Andy Gasparini
    • True to item
Looked good, features were accurate especially the glow in the dark. However, the small latch broke after a while and we had to get it fixed.
Reviewed in the United States on November 6, 2025 by Lisa
    • Estoy feliz con El.
Excelente Muy bonito Buena calidad. Es como se ve en la pagina.
Reviewed in the United States on July 29, 2025 by Hildebrando Mesa
    • Very disappointed
Not at all what I was hoping for. The Bluetooth connection only lasts 3, 5, or 10 minutes and the watch does not provide any sort of alert when messages or calls are received. Band feels vastly different from my other G-Shocks & the watch overall just “feels” cheaper/more fragile than I’ve come to expect. Returned for refund. ... show more
Reviewed in the United States on May 22, 2025 by Jason
    • G-Shock
This is my new favorite of my collection. Great looking watch with more then enough gadgets to play with.
Reviewed in the United States on January 19, 2025 by Dan
    • Great looking watch
Love my G-SHOCK and your price beat most
Reviewed in the United States on January 3, 2025 by Nicholas Proto
    • Love it.
My new favorite all purpose watch.
Reviewed in the United States on December 22, 2024 by M. Dziedzic

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