Movement: Swiss Ronda 5030.D Quartz Chronograph Case Measurements: 50mm Case Thickness: 18mm Crystal: Sapphire Coated Mineral Crown: Screw Down w/ Screw Down Function Pushers Bracelet: Stainless Steel Bracelet Measurements: 8-1/2" L x 24mm W Clasp: Push Button Dual Deployant Maximum Wrist Size: 8-1/2" Water Resistance: 30 ATM - 300 Meters - 660 Feet