CASIO G-SHOCK G-SQUAD GBD-100SM-4A1JF Bluetooth Equipped Fitness Watch with Step Tracker and Smartphone ConnectivityProduct Highlights G SHOCK GBD 100 Rich Color Variations The GBD 100, part of the G SHOCK sports line "G SQUAD," features a smartphone link function and comes in vibrant colors. Using vivid resin and transparent resin based on black and white, it creates a bright image, resulting in a color scheme that enhances the enjoyment of activities. In terms of functionality, it connects to smartphones via Bluetooth. By collaborating with the smartphone's GPS