The Promaster CB5037-17X is a tough, street-style model with specifications that can withstand the harshest of environments. The dark green dial is combined with a black case, and the calf leather band has a two-layer finish that makes the most of its thickness. The bezel, crown, and other parts have a honed finish. The matte finish with reduced luster accentuates the rugged impression. No need for periodic battery replacement or time setting】Equipped with Citizen's proprietary Eco-Drive photovoltaic technology, this watch is hassle-free. The world time radio-controlled clock, which is compatible with four areas around the world, automatically corrects the time and calendar on a regular basis, so you can rest assured even when you are traveling. The watch is also equipped with a sapphire glass for water-resistance and a sapphire glass for durability. The watch is protected by water resistance and a highly durable sapphire glass. Product Details: Photo-powered Eco-Drive radio-controlled watch, accuracy ±15 seconds/month (when not receiving a signal), sapphire glass (anti-reflective coating), 20 ATM water resistance, luminescent hands and indexes, date display. Details: dark green dial combined with a black case and a thick calf leather band with a two-layer finish fit for street fashion. Honed finish on bezel, push buttons, and crown. The matte finish with low luster accentuates the rugged impression.