IP is ion plating or vacuum coating to prevent discoloration.

The Boderry Windmill B is named by movt which looks like a windmill to power everything needs power. The Watches has 72 hours power reserve.  Crafted with sapphire crystal front and back and a high beat auto-wind movement. Never feel naked with your Windmill.

* Sapphire Crystal (front and back) is featured with scratch-resistant which means your watches can be as new as you just had it after you wore it for years, and it is extremely hard and more crystal than mineral glass.

* The case is used pure 316L Stainless steel. 316L Stainless steel is often used in the medical industry. We make the case shining. You can even clearly see yourself in it as a mirror. We make everything perfect to meet a high-end watch quality demand and be affordable.

* Movement: Hangzhou7570

• 21 pieces of the functioned jewel are embedded to power it the stronger stabilization.
• 28800vph/Hz high vibration keeps good time.
• The error value conforms to the watch industry standard.