Radio-controlled: Automatically receives radio signals to precisely adjust the time and calendar - Signal reception and result indicator - World time function (25 time zones) - 24 hour indicator - 6-month power reserve - 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 - Sapphire crystal - 44.5mm diameter - 100M water resistant - Caliber 8B92 - Cabochon crown.