Zenith, DEFY series, model: 03.9300.3620 / 79.I001, automatic winding stainless steel, diameter: 41mm, complete set, two straps. Case and Dimensions: The 41mm titanium (or stainless steel) case features a signature 12-sided faceted design, combining modern architectural flair with a sporty vibe. Dial design: The blue skeletonized dial is presented in the brand's classic four-pointed star shape. At the 6 o 'clock position, there is a 1 / 10 second sub-dial, allowing the mechanical structure of the high-frequency movement to be fully visible. Movement configuration: Equipped with the El Primero 3620 SK high-frequency automatic movement, with a frequency of 5Hz (36,000 vibrations per hour), a power reserve of approximately 55 hours, and support accurate timing of 1 / 10 second. Strap configuration: The blue rubber strap is shown in the picture. This model also has a metal chain strap version and supports a quick-release strap system, making it convenient to switch styles. Waterproof performance: 100 meters of water resistance, which can meet the waterproof needs of daily sports and life.