Taking it up a notch with the reinvented Citizen Perpetual Calendar Chrono timepiece with a 1/20 second chronograph, perpetual calendar and dual time in a stainless steel case and bracelet completed with a blue-gray dial. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E820. Included: 1 Watch(es) Features: Chronograph, Quick Ship Battery Type: Lithium Cells Jewelry Closure: Fold Over Clasp Power Source: Ecodrive Watch Movement: Quartz Water Resistance: 100m Band Color: Silver Tone Dial Color: Blue Metal Color: Silver Tone Case Thickness: 11.2mm Case Width: 44mm Watch Band Length: 8 Inch Band Content: Stainless Steel Case Materials: 100% Stainless Steel Band Width: 22mm Care: Wipe Clean Country of Origin: Imported Quick Ship items ship directly from the manufacturer within 3 to 5 business days.