Citizen Eco-Drive x Analog ft. Titanium Men Casual Formal Round 50m Water Resistant Watch BJ6520-82A BJ6520 BJ-6520 Discover a timepiece that combines innovative technology with sleek design. This eco-friendly watch boasts a 6-month power reserve, sapphire crystal, and titanium case with band. Enjoy precise timekeeping, insufficient charge warning, and overcharge prevention functions, all wrapped in a stylish 39.5mm diameter case. Caliber Number / Movement E031 (solar Eco-Drive) Power Reserve / Accuracy Approximately 6 months when fully charged (+/-15 seconds per month) Crystal Sapphire crystal Luminous Nil Case & Band Material Titanium case with titanium band (three-fold clasp with push-button release) Water Resistance 50m / 5 bar Case Size Diameter: 39.5 mm Other Specifications Citizen Eco-Drive x Analog ft. Titanium Insufficient charge warning function Overcharge prevention function Regular timekeeping (analog display)