Introducing the latest addition to the MRG-B5000 series, the flagship line of the G-SHOCK brand of shock-resistant watches. The new color MRG-B5000BA Ao-zumi is designed in the image of the blue ink used in India ink paintings and calligraphy. 

With a nod to the design of the DW-5000C, the first-ever G-SHOCK released in 1983, the MRG-B5000 brings a brilliant shine and a dignified distinction to the shock-resistant watch by employing cutting-edge metals finished with master polishing craftsmanship. 

To apply sophisticated polished finishes to even the tiniest corners of the complex bezel form made of 25 different components, Casio developed the new Multi-Guard Structure. The new structure incorporates shock-absorbent parts in the multi-component bezel to ensure excellent shock resistance, while also allowing polished finishes to be applied to each component, down to the most challenging spots, for a stunningly beautiful finish. The band employs a unique structure as well. The separate pins are pressed in round holes in each metal link which allows detailed polishing for an equally beautiful finish on the band. 

The quality of the master polishing craftsmanship shows on the cutting-edge, made-in-Japan materials used for the MRG-B5000. COBARION, which has a hardness about four times that of pure titanium and a brilliant gleam comparable to platinum, is used for the top surface of the bezel. The band is made of DAT55G, a titanium alloy that is about three times harder than pure titanium and highly workable, making it scratch-resistant and ensuring a long-lasting, beautiful mirror finish.

MRG-B5000BA is applied with a diamond like carbon black base coloring accented by band pins and bezel parts with a blue ion-plated (IP) finish. The dial uses blue and gold vapor deposition coloring along with the brick pattern border, which is an identifying characteristic of the original DW-5000C model.

Regarding the function, the MRG-B5000 comes with a radio-controlled calibration and smartphone link connectivity. The watch connects with the dedicated CASIO WATCHES smartphone app to automatically adjust to the correct time. It also comes equipped with a solar charging system and a high-brightness LED light for added convenience.

There are three base models: the standard square case DW-5600, the octagon bezel GA-2100, and the large size case GA-110. There are two colorways: black and transparent color. Regarding the functions, all five watches are equipped with lights for digital displays and faces that give a clear view in dark places. GA-2100SR, GA-2100SRS, and GA-110SR watches can be set a world time from 48 cities. All five watches are shock resistance and water (200-meter) resistance. And these watches include a stopwatch and countdown timer function.