The Citizen Eco-Drive Blue Angels World Chronograph A-T is a radio-controlled perpetual calendar chronograph world timer with atomic timekeeping in 5 time zones (North America, the UK, Europe, Japan and China) and automatic time in 26 world cities. Specific functions also include a 1/20 second chronograph that measures up to 60 minutes, perpetual calendar, 12/24 hour time, day-date, alarm and power reserve indicator. This handsome timepiece in stainless steel with blue ion plated bezel features an intricate blue and yellow dial and non-reflective sapphire crystal. Named for the elite flight squadron of the U.S. Navy, this Blue Angels watch is as graceful and accurate as the group's piloted precision, with their official insignia appearing on the case back of this 200 meter water resistant watch. Citizen Eco-Drive is fueled by light, any light, so it never needs a battery. Combined with atomic timekeeping, it is the most accurate watch in the world. The use of the Blue Angels name and logo is with the permission, but not endorsement, of the U.S. Navy.