Take to the skies with the new Citizen Promaster Sky, featured in black ion-plated stainless steel and boasting Radio-Controlled Atomic Clock Synchronisation for superior accuracy in 24 worldwide cities, 1 second chronograph measuring up to 60 minutes, anti-magnetic, anti-shock, alarm, 12/24 hour time, perpetual calendar and a compass ring rotating bezel. Powered by Citizen\'s award-winning Eco-Drive technology which harnesses both natural and artificial light and converts it into energy to power the watch - a watch that never needs a battery.