[2-in-1 design] The addiesdive pilot diver's watch is an automatic watch with a super-convex luminous dial lug width 20 mm overall watch length 220 mm case diameter 40 mm height: 13 mm standard size looks Not too big. [Material] NH35A automatic mechanical movement just swing the arm to increase the power no battery required 41 hours power reserve. Marine-grade 316L stainless steel case double-sided curved sapphire crystal ceramic bezel and quick-change suede strap. [Waterproof Rating] Waterproof up to 20 ATM / 200 meters / 20 bar / 656 feet it can be used for diving surfing and other marine sports. [Super Luminous] Swiss retro luminous hands and timeline are yellow-green for excellent nighttime brightness [Customer Service]: We will replace your product within 90 days without reason; 2 years warranty 24 hours customer service. If you have any questions please feel free to contact our customer service. We will help you solve the problem.