With Perpetual Calendar Atomic Timekeeping, this radio-controlled chronograph watch from Citizen blends timelessness with technology. Blue dial with chronograph sub-dials and tachymeter bezel; perpetual calendar, power reserve indicator, and date display 43.0mm stainless steel case; anti-reflective sapphire crystal Japanese quartz movement Eco-Drive® technology is sustainably powered by light so it never needs a battery Stainless steel link bracelet; push-button fold-over clasp Water-resistant to 100 metres We are an authorized Citizen dealer