Seiko Solar Chronograph Alarm SSC433P1 SSC433P Men's WatchSeiko Solar Chronograph Alarm SSC433 SSC433P1 SSC433P Men's Watch Its 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, its the sweeping chronograph hand that stands as a stark contrast!