Watch Brand: Rolex Cosmograph/DATONA Automatic Mechanical Men's Watch, Watch Movement: Imported Japanese Fully Automatic Mechanical Movement, Watch Material: High Hardness Wear-Resistant Glass Lens, Full Steel Case and Band, Black Chronograph Speed Word Circle. Watch Function: 3-Hand Chronograph (the sub-dials at the 3, 6, and 9 o'clock positions simulate chronograph functions: 3 o'clock date sub-dial, 6 o'clock 24-hour interlinked dial, 9 o'clock two-circle hour hand sub-dial with a small needle moving two notches), black Rolex dial, watch magnifying convex date display window. Watch Dimensions: Case 40mm, Circumference 230mm, Thickness 12mm, Strap Width 16-20mm, Weight 114g. Watch Markings: Brand logo on the surface, back, strap, and clasp. Watch Water Resistance: Splash Resistant for Daily Life (splash resistant refers to short-term exposure to water such as splashes or rain; after exposure to water, please shake dry or wipe dry promptly). Watch Warranty: One-year warranty on the movement; other watch components outside of the movement are not covered by the warranty, which is standard practice in the watch industry. For any additional extended warranty services, please contact the store owner for consultation. Watch Packaging: Simple packaging; if gift box packaging is needed, please purchase from the packaging accessories section.