Citizen Eco-Drive x Caliber E365 ft. 365 Days Men Casual Formal Tonneau 100m Water Resistant Watch BN1015-52E BN1015 BN-1015Discover the perfect blend of style and sustainability with Citizen's latest Eco-Drive timepiece, featuring a bold design, innovative light-powered technology, and a 365-day power reserve on a single charge, all while showcasing the brand's 50-year journey in quartz and Eco-Drive watchmaking.Caliber Number / MovementE365 (solar Eco-Drive)Power Reserve / AccuracyApproximately 12 months when fully charged (+/-15 seconds per month)CrystalSapphire crystal (anti-reflective coating)LuminousNilCase & Band MaterialStainless steel case with metal band (three-fold clasp with push-button release)Water Resistance100m / 10 barCase SizeThickness: 11.1 mmDiameter: 42.5 mmLength: 44.0 mmOther SpecificationsCitizen Eco-Drive x Caliber E365 ft. 365 DaysDate displayInsufficient charge warning functionOvercharge prevention functionRegular timekeeping (analog display)