Straight from the Casio Vintage Collection comes a timepiece that never goes out of style. The B640 combines style with features Casio is known for such as an EL backlight and a 1/100th second stopwatch. This timepiece is the perfect complement to any outfit.. Number of Batteries: 1 Included: 1 Watch(es) Features: Water Resistant, Quick Ship Battery Type: Lithium Cells Power Source: Battery (included) Watch Movement: Quartz Water Resistance: 50m Band Color: Silver Tone Dial Color: Gray Metal Color: Silver Tone Case Thickness: 10.5mm Case Width: 41.2mm Watch Band Length: 9 1/2 Inch Band Content: Metal Alloy Case Materials: 100% Stainless Steel Battery Size: Cr2016 Band Width: 10mm Care: Wipe Clean Band Type: Metal Link Country of Origin: Imported Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.