AUTOMATIC MOVEMENT- Automatic Watches with Miyota8N24 automatic mechanical movement.With a power reserve of up to 40 hours. Support self-winding, and it is powered by the natural movements of your wrist, need be worn at least 8 to 10 hours a day. WINDOW- Skeleton Mechanical Wrist Watch using Sapphire Crystal mirror plane wear-resistant and scratch-resistant adding a sense of sophistication and mystery. Suitable for any occasion CASE DIAMETER- Men watches use 316L stainless steel material with 43mm case diameter and 21mm black Genuine leather strap. WATERPROOF- Men's watches waterproof 50m strong pressure waterproof, suitable for short periods of recreational swimming and showering, but no diving, snorkeling, hot shower or hot springs. GIFT- Business watches for men, perfect gift suitable for the husband, boyfriend, etc. Trendy fully hollowed mechanical watch, high-grade gift box, a decent gift choice.