Citizen Eco-Drive x Analog ft. Perpetual Calendar Men Casual Formal Round 100m Water Resistant Watch BL5551-14H BL5551 BL-5551Experience the pinnacle of timekeeping with a cutting-edge watch that redefines precision and style. Featuring a chronograph, perpetual calendar, dual time, and more, this sleek timepiece is powered by light, eliminating the need for batteries. Discover a masterpiece of innovative design and functionality.Caliber Number / MovementE820 (solar Eco-Drive)Power Reserve / AccuracyApproximately 9 months when fully charged (+/-15 seconds per month)CrystalMineral crystalLuminousLuminous on hands and indexesCase & Band MaterialTitanium case with leather bandWater Resistance100m / 10 barCase SizeDiameter: 43.0 mmOther SpecificationsCitizen Eco-Drive x Analog ft. Perpetual CalendarDate, dual time and 24-hour displayAlarm functionChronograph up to 60 minutes in 1/20-second incrementPerpetual calendarInsufficient charge warning functionOvercharge prevention functionRegular timekeeping (analog display)