Seiko Solar Chronograph Alarm SSC433 SSC433P1 SSC433P Men's Watch It’s the solar panel behind the dial that does the trick! Expose it to the sunlight (not directly, though) for a few hours on the first day to make it work flawlessly for the days to come. There is an energy-saving function as well for the times it will run low on the charge. But more than anything else, it’s the sweeping chronograph hand that stands as a stark contrast! Features: Stainless Steel Case Stainless Steel Bracelet Solar Powered Caliber: V172 Hardlex Crystal Black Dial Luminous Hands And Markers Chronograph Function Alarm Function Tachymeter Power Reserve Date Display Pull Out Crown Deployment Clasp 100M Water Resistance Approximate Case Diameter: 43mm Approximate Case Thickness: 12mm