Blue Angels inspired Eco-Drive, powered by any light source, eliminating the need for watch batteries. Anti-Reflective Sapphire Crystal The Blue Angels are the Navy's elite flight demonstration squadron renowned for their precision and grace showcased in each of their flight maneuvers. This precision and grace is exhibited in the CITIZEN Promaster Blue Angels Skyhawk A-T with precise atomic timekeeping in 43 cities. Other features include a chronograph, perpetual calendar, dual time, alarms, countdown timer, digital backlight and UTC display, power reserve and pilot's rotating slide rule bezel. This model appears in a stainless steel case and bracelet, yellow accented dark blue dial and bezel with the Blue Angel's insignia replicated on the caseback. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number U680.