SIZE & PACKEGING * Case Diameter: 40mm/1.57" * Case Thickness: 11.5mm/0.45" * Strap Width: 20mm/0.78" * Strap Length: 240mm/9.45", adjustable * Package Included: OLEVS Watch x 1; Original Watch Box x 1; English Instruction Manual x 1 FEATURES & MATERIALS * Imported Quartz Movement * Tough Stainless Steel Case * Hour/Minutes/Seconds Sub-Dial * 4 Colors For Choice * Luminous/Chronograph/Calendar Multiple Functions Chronographs Instruction The OLEVS chronographs include a stopwatch function that can measure time up to 1/10 of a second. Each sub-dial tracks a different measurement. The extra pushers can be used to start, pause and stop the chronograph function. Authentic Brand Watch Adopt imported technology and highest standards of craftsmanship. Each and every OLEVS timepiece goes through rigorous assemblage, testing, and precision to assure every watch you own stands the test of time. This watch is well packaged in a stylish and luxurious OLEVS watch box. It is a great gift choice to your loved ones for New Year's Day, Valentine's Day, Christmas, Birthday, Anniversary and Father's Day,Or as a business and party present. NOTE: Please DO NOT press any buttons under water. Please DO NOT use it in extreme hot or cold temperature. The watch is 30M waterproof for daily use. But should not be used in bathing, sauna and other multi-water or high warm environments. Preventing the waterproof rubber ring from being inflated or contracted by the temperature will cause voids and accelerate aging, which will affect the waterproof function.