Citizen Men's Watch Eco Drive Promaster Sky Radio Controlled Chrono Blue Case Material_Gold PVD The black dial is complemented The black dial is complemented by an oversized date window at the 12 o'clock position Striking grey metallic tones blend effortlessly with each other in this cool Eco Drive Radio Controlled E660 Japanese Quartz Movement 10 Month Power Reserve (3 years in Power Save Function) Tachymeter with Pilot Slide Rule Worldtimer Function UTC time Digital Display of Local and World Time Chronograph Atomic Clock Synchronisation 46mm x 14mm Brushed Black IP 316L Stainless Steel Case Scratch Resistant Sapphire Crystal Screw Down Crown Solid Caseback Bi Directional Rotating Bezel