Casio G-Shock Men's Watch GA-2100-4A analog mens Just pair with a smartphone

Just pair with a smartphone to track runs

Shock-resistant construction and water resistance up to 100 meters frees you from worry about bumps and scrapes

features raised metallic index marks in a vapor deposition finish that shine like pearls and seashells — treasures of the ocean

Water resistant

Tap into the dedicated app for visuals that help you see your own personal records and easily manage life log data and activity history

Casio G-Shock Men's Watch GA-2100-4A analog mens Just pair with a smartphoneFeatures ANALOG DIGITAL 2100 Series From G SHOCK, the toughness watches that continue to evolve in search of ultimate strength, this model uses a carbon core guard structure. The case is made of fine resin containing carbon fiber that, although lightweight, exceeds the rigidity of normal resin. Prevents damage and deformation from impacts to protect the internal module. Additionally, the two layer structure of the back cover also guards against