Haofa brand watch focuses on the design and manufacture of high-end watches. It is a professional watch manufacturer integrating R & D, production and sales. With this rich watch manufacturing experience, advanced production technology and excellent after-sales service system, it is a watch brand worthy of consumers' trust. Product Description Watch Model: 2371 Movement: 4H368 Drive: Single Spring Drive Winding Method: Automatic Winding Power Storage: 60H/50H in Timing State Vibration Frequency: 28800 (times/hour) Case Diameter: 38mm Case Thickness: 13.5mm Case Material: Stainless Steel Mirror: Synthetic Sapphire Strap Material: Rubber Bottom Cover: Synthetic Sapphire Waterproof Depth: 30M Crown: Straight-in Note: Due to manual measurement, the actual size of the product may differ slightly from the data we provide Warranty:3 Years