ATOMIC TIMEKEEPING:  Soar to new heights with the modernized CITIZEN Promaster Navihawk timepiece. A chronograph with all the tools for professional use, featuring world time in 24 cities, radio control, tachymeter, perpetual calendar, alarm and power reserve indicator. Showcased here in a stainless steel case and mesh bracelet with black dial and red accents. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E660.