Citizen Promaster x Radio-Controlled ft. Sky Series Men Casual Round 200m Water Resistant Watch CB5006-02L CB5006 CB-5006 Discover the Citizen Promaster Sky travel watch, a radio-controlled timepiece that syncs automatically in Europe, North America, China, and Japan. It features Eco-Drive technology, a stainless-steel case with black ion plating, a blue bezel and dial, sapphire glass, a perpetual calendar, an alarm, and a durable black silicone strap. With 200-meter water resistance, it is perfect for any adventure. Caliber Number / Movement E660 (solar Eco-Drive) Power Reserve / Accuracy Approximately 10 months when fully charged (+/-15 seconds per month) Crystal Sapphire crystal Luminous Luminous on hands and indexes Case / Band Material Stainless steel case with polyurethane rubber strap Water Resistance 200m / 20 bar Case Size Diameter: 45.0 mm Other Specifications Citizen Promaster x Radio-Controlled ft. Sky Series Day, date, 24-hour and dual time display Insufficient charge warning function Overcharge prevention function Power reserve indicator Power saving function (second hand stop to save power when left in the dark) Alarm function Chronograph up to 60 minutes in 1-second increment Perpetual calendar World time (24 time zones) Global radio-controlled (Japan/USA/Germany/China) Regular timekeeping (analog display)