BODERRY Skeleton Men’s Watches Titanium Automatic Mechanical Watch for Men 72H Power-Reserve 5ATM Waterproof Luminous Sapphire Crystal Wrist Watch and Leather Strap Men’s Steampunk Gift-Urban

Case of lightweight titanium, which is 30% lighter and 40% harder than stainless steel. Sapphire crystal mirror surface, sapphire measures 9 on the Mohs scale and is second only in hardness to diamond. Combining a titanium case with a sapphire mirror creates a tough watch that is rust-proof, scratch-proof, and impact-proof. Titanium case provides a constant temperature-wearing experience in any season. If you need a watch that can be worn all year round in different scenarios, this is a perfect choice.

The customized AAA-level Automatic movement is equipped with 21 synthetic jewel bearings, a power reserve of more than 72 hours, and a frequency of 28,800 vibrations per hour, ensuring a precise timing from -15 ~ +25 seconds/24 hours. Visible mainspring for gauging how much power is left. Kinetic energy is harnessed from your activities and used to power the caliber, which makes it not need a battery to achieve long-lasting and stable performance.