Amazon.com: GMAS2100-1A : Clothing, Shoes & Jewelry。Slip on a splash of clear metallic pleasure with the ever-popular analog-digital combination GA-2100 in a slimmer, more compact profile. Metallic translucent designs in a choice of colors for versatile watches that pair with any outht, all year round. Index markings treated with a half-matte vapor deposition finish bring to life the clear metallic look. Case size (Lx Wx H) 46.2 × 42.9 × 11.2 mm Weight 41 g Case and bezel material Carbon / Resin Band Resin Band Construction Shock Resistant Carbon Core Guard structure Water resistance 200-meter water resistance Power supply and battery life Approx. battery life: 3 years on SR726W X2