Casio G-Shock 2100 Steel - Green Dial Steel/Green/Black GBM2100A-1A3 Metal-clad daring meets sophisticated gleam in a GBM2100 that delivers Smartphone Link via Bluetooth and Tough Solar charging system, all in a meticulously finished metal design with iconic octagonal bezel. Choose from a basic black dial or metallic vapor deposition in blue or green, each complemented by a band made of environmentally responsible bio-based resin. Welcome to a whole new level of metal-clad 2100 functionality — tough construction and stylish design in a timepiece that takes you from casual settings to business meetings without a thought.