Casio Men's G-SHOCK GBM-2100 GBM-2100B-7AJF WatchProduct Highlights Since its launch in 1983, the G SHOCK tough watch has been evolving relentlessly in pursuit of unwavering strength. Introducing the GM 2100 model with its octagonal form, now equipped with smartphone link and tough solar features in a metal bezel. The band is made from bioplastic, showing consideration for the environment. This model seamlessly combines toughness and design for versatile use from casual to business settings. Product