Go where the wind takes you with the Navihawk A-T. With atomic clock synchronization for superior accuracy, this perpetual calendar chronograph receives radio signals both automatically and on-demand in North America, the United Kingdom, Europe, Japan and China. The Navihawk A-T ensures you are always on time, no matter where your journey takes you. The stainless steel case, stainless steel mesh bracelet and black dial features world time in 43 cities, 2 alarms, 1/100-second chronograph, 99-minute countdown timer, UTC display and shock sensing function.Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number U680.