Citizen Eco-Drive x Chronograph ft. Luminous Dial Men Casual Formal Round 100m Water Resistant Watch CA4507-84X CA4507 CA-4507 Experience precision and style with this solar-powered timepiece, featuring a 9-month power reserve, luminous dial, and chronograph functionality up to 60 minutes. Water-resistant to 100m, this stainless steel watch boasts a range of innovative features, including heart rate count, date and 24-hour display, and overcharge prevention function. Caliber Number / Movement B620 (solar Eco-Drive) Power Reserve / Accuracy Approximately 9 months when fully charged (+/-15 seconds per month) Crystal Mineral crystal Luminous Luminous on dial, hands and indexes Case / Band Material Stainless steel case with metal band (three-fold clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.0 mm Diameter: 44.0 mm Other Specifications Citizen Eco-Drive x Chronograph ft. Luminous Dial Heart rate count (base 30 pulsations) Date and 24-hour display Chronograph up to 60 minutes in 1/5-second increment Insufficient charge warning function Overcharge prevention function Equipped with small second hand Regular timekeeping (analog display)