Brushed and Polished Solid Silvertone Stainless Steel Case and Screwdown Caseback. Case 40mm. Precise Citizen Eco-Drive Caliber H500 Japanese Chronograph Movement (Charges in Sunlight or Indoors - No Batteries to Change - 180 Day Power Reserve when Fully Charged). Scratch Resistant Anti-Reflective Hardened Mineral Crystal. Overcharge Prevention Feature Insufficient Charge Warning Quick Start Feature. Jet Black Textured Dial with Silvertone Hands and Hour Markers, Red Chronograph and Subdial Hands Chronograph Subdials located at the 2:00-6:00-10:00 Hour Positions. Water Resistance 100 Meters.