Citizen Promaster x Radio-Controlled ft. Sky Series Men Casual Formal Round 200m Water Resistant Watch CB0240-88L CB0240 CB-0240 Experience unparalleled precision and style with a watch that defies the demands of daily wear. Featuring advanced technology, including perpetual calendar, world time, and aviation slide rule, this timepiece is designed to keep pace with your active lifestyle, powered by light-only Eco-Drive technology. Caliber Number / Movement H145 (solar Eco-Drive) Power Reserve / Accuracy Approximately 6 months when fully charged (+/-15 seconds per month) Crystal Sapphire crystal (anti-reflective coating) Luminous Luminous on hands and indexes Case & Band Material Stainless steel case with metal band (three-fold clasp with secure lock, push-button release) Water Resistance 200m / 20 bar Case Size Diameter: 42.4 mm Other Specifications Citizen Promaster x Radio-Controlled ft. Sky Series Flying distance and navigation calculations Screw-down crown Screw case back Date display Insufficient charge warning function Overcharge prevention function Perpetual calendar World time (26 cities) Summer time on/off Global radio-controlled (Japan/USA/Germany/China) Regular timekeeping (analog display)