CITIZEN Promaster Dive E365 is a professional-grade dive watch powered by Eco-Drive (Caliber E365) and built for underwater use. Its 46 mm stainless steel case and vivid blue iridescent dial prioritize legibility and durability for diving and everyday wear. Key attributes: Blue | Silver | Stainless steel | 300M water resistance | Anti-reflective sapphire crystal | Eco-Drive movement with 365-day power reserve | Impact- and shatter-resistant crystal | BENEBiOL PU strap with buckle | Screw-down crown at 4 o'clock | Date display | Unidirectional bezel | Blue iridescent dial | Black easy-grip unidirectional bezel | Hidden lugs | Luminous hands and markers | Dimensions & fit: Case diameter: 46 mm | Composition & care: Stainless steel | BENEBiOL PU | Sapphire crystal | Rinse with fresh water after exposure to salt water or chlorine. Wipe with a soft cloth and avoid strong impacts. Have water-resistance seals checked periodically and servicing performed by an authorized service center.