Citizen Promaster x Eco-Drive ft. Nighthawk Men Casual Formal Round 200m Water Resistant Watch BJ7135-02E BJ7135 BJ-7135Experience the cutting-edge design and advanced features of the Promaster Nighthawk, inspired by military stealth helicopters. With Eco-Drive technology, dual time zones, and luminous hands, this all-black watch with bold white accents is ready for any adventure, combining style and functionality in perfect harmony.Caliber Number / MovementB877 (solar Eco-Drive)Power Reserve / AccuracyApproximately 6 months when fully charged (+/-15 seconds per month)CrystalMineral crystalLuminousLuminous on hands and indexesCase & Band MaterialStainless steel case with leather bandWater Resistance200m / 20 barCase SizeDiameter: 42.0 mmOther SpecificationsCitizen Promaster x Eco-Drive ft. NighthawkFlying distance and navigation calculationsScrew-down crownScrew case backDate, dual time and 24-hour displayInsufficient charge warning functionOvercharge prevention functionRegular timekeeping (analog display)