Amazon.com: Casio GA-2100 Series Men's Carbon Core Guard Digital Analog Combination Model Wristwatch, Limited edition model / FUTR collaboration model, 1個, Bracelet Type : Clothing, Shoes & Jewelry
What's inside the Casio G-Shock GA-2100? Check out the Carbon Core Guard and the 5611 module.
Casio G-Shock 2100 Utility Black Series Blue Detailing GA-2100-1A2ER - First Class Watches™ USA