Citizen Eco-Drive Radio-Controlled Chronograph World Timer; Blue Angels edition with caseback insignia. Atomic time in 26 world cities; radio-controlled accuracy in 5 zones. 1/20 second chrono up to 60 minutes, perpetual calendar, 12/24 hour time, power reserve, non-reflective sapphire crystal. Stainless steel, blue ion plating, leather strap. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Product details: Movement: Eco-Drive Band: Polyurethane Case Size (mm): 40 Crystal: Mineral Crystal Water resistance: 20 bar Additional functions: Synchronized to Atomic Time Clock for Superior Accuracy Atomic Timekeeping Technology with Synchronized Time Adjustment Available in 26 Time Zones 1/20 Second Chronograph Measures up to 60 Minutes Perpetual Calendar 12/24 Hour Time Power Reserve Indicator Day/Date Warranty: 5 years Limited Manufacturer Warranty