Prospex,Radio-Sync Solar Chronograph, 44.5mm

Radio-Sync Solar Chronograph, Radio-controlled: Automatically receives radio signals to precisely adjust the time and calendar, Powered by light energy- No battery change required, 6-month power reserve once fully charged, Signal reception and result indicator, World time function (25 time zones), 24 hour indicator, Power save function, Chronograph measures up to 60 minutes in 1/5 second increments with split time measurement function, Date calendar, LumiBrite hands and markers, Screwdown crown, Glass caseback, Case diameter: 44.5mm, Water-resistant to 10 bar, 100 meters (330 feet),Caliber 8B92