Take to the skies and look stylish on land, too – with the innovative Promaster Air men's chronograph watch from Citizen. This exceptional, pilot-inspired watch features a silver-tone stainless steel case accented by a black stainless steel case that holds a blue ion-plated rotating bezel with a professional calculator function and tachymeter on a blue dial with luminous hands and markers and a sapphire crystal. The advanced technology of this timepiece incorporates atomic time clock synchronization for superior accuracy, a 1-second chronograph that measures up to 60 minutes, and a perpetual calendar. The black polyurethane strap fastens with ease and like other watches in the Promaster line, it is water resistant up to 200 meters. This sporty, high-performance watch utilizes Eco-Drive technology that's sustainably powered by any light and never needs a battery.