Features: Stainless Steel Case Stainless Steel Bracelet Eco-Drive Movement Caliber: U680 Sapphire Crystal Blue Dial Analog Digital Display Chronograph Function Navigation Calculation Bezel Alarm Function Perpetual Calendar World Time Global Radio-Controlled Countdown Timer Power Reserve Indicator Power Saving Function Insufficient Charge Warning Function Overcharge Prevention Function 12/24 Hours Display Luminous Hands And Markers Day And Date Display Solid Case Back Deployment Clasp 200m Water Resistance Approximate Case Diameter: 45.7mm Approximate Case Thickness: 14.3mm Approximate Lug Width : 22mm