Features high-end light-powered Eco-Drive movement with SATELLITE WAVE GPS Cal. F990. - Twice the spinning speed of hour and minute hands for HOME time corrections (compared to previous model) - High-speed twin-coil motor reduces the time required for hand movements forward or reverse (equivalent to 360° moving of minute hand) in less than one second. - Receives a time signal from a GPS satellite in a minimum of 3 seconds - Corrects time and calendar by syncing with GPS satellites (for any 39 cities) - Shows the time in two different world time zones simultaneously, and it switches home time and local time in one instant step. - 1/1 second chronograph measures 24 hours. - Light-Level Indicator*4 detects and displays the intensity of light striking the dial in seven sensitivity levels. - Features aviation scale and design using ground-air visual signal codes*5 to enhance the characteristics as a professional pilot watch.