CASIO G-SHOCK G-B001RG-4JR Since its release in 1983, the tough watch G-SHOCK has continued to evolve in pursuit of unyielding strength. This is the G-B001 series, equipped with mobile link functionality and a detachable bezel. The G-B001 is an evolved model of the DW-001, which was born in 1994 with the concept of Capsule Tough. While retaining the original form and shock-resistant structure, it adopts a carbon core guard structure and achieves a unique design that further guards the resin bezel case with a bezel. The design is inspired by 80's retro culture and game graphics. The capsule bezel is removable, allowing you to enjoy two designs with one watch. In addition, it links with a smartphone via a dedicated app, automatically correcting the time, making various settings, and displaying information updates from the app on the watch.