Tommy Hilfiger Walker 1710621 Multi Function Data Brand Calvin Klein battery operating time: *10 months battery operating time: *10 months on rechargeable battery (operation period with normal use without exposure to light after charge) *22 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy: ±15 seconds per month 12 24 hour format Date month display swapping Day display (days of the week selectable in six languages) Regular timekeeping: Hour Quartz Chronograph Movement 42mm Case Size Stainless Steel Case Silicone Strap Date Display 50 Meters Water Resistant The black dial Featuring a stainless steel case and bracelet with a captivating two tone silver and gold finish