Citizen Promaster x Aqualand ft. Marine Series Men Casual Formal Round Diver 200m Water Resistant Watch BN2031-85E BN2031 BN-2031 This versatile watch transitions seamlessly from professional to aquatic settings, combining style and functionality. Crafted from durable stainless steel and water-resistant up to 200m, it features a 46.1mm case, an easy-to-read dial, and a screw-lock crown. Advanced features include a depth meter and maximum depth memory, with ISO6425 diving certification. Its sleek silver tones and striking black dial with powder blue accents are powered by Eco-Drive technology, harnessing light for up to 11 months. Caliber Number / Movement J250 (solar Eco-Drive) Power Reserve / Accuracy Approximately 11 months when fully charged (+/-15 seconds per month) Crystal Mineral crystal (anti-reflective coating) Luminous Luminous on hands, indexes and bezel Case / Band Material Stainless steel case with metal band (three-fold clasp with secure lock, push-button release with slide extender) Water Resistance 200m / 660ft diver Case Size Diameter: 46.1 mm Other Specifications Citizen Promaster x Aqualand ft. Marine Series Unidirectional rotating bezel Screw-down crown Screw case back Date display Insufficient charge warning function Overcharge prevention function Power reserve indicator Water depth measurement (up to 70 meters) Maximum depth memory (auto start dive mode) Regular timekeeping (analog display)