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 and automatic time in 26 world cities. 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 men's watch in stainless steel with blue ion plated bezel features an intricate blue and yellow dial, non-reflective sapphire crystal, and a patterned blue leather strap with buckle revealing yellow on its reverse. This Blue Angels official insignia appears on the case back of this 200m water-resistant watch. Citizen Eco-Drive is fueled by light, any light, so it never needs a battery. The use of the Blue Angels name and logo is with the permission, but not endorsement, of the U.s. Navy.