The Master Carbon SEAL Automatic combines all the details that Luminox is famous for durability, luminosity, water resistance, readability - with an automatic movement that also has a day and date window. The 45mm case is made from a breakthrough material, Carbonox™+, which is lightweight, durable, hypoallergenic, weatherproof, shock and scratch resistant.Features:Luminox Light Technology: - The unique Luminox Light Technology (LLT) ensures ata-glance visibility in fact, the technology provides a constant glow 24/7, no matter what the conditions are, for up to 25 years. The self-powered illumination system utilizes tiny micro tritium gas tubes to create ultimate visibility in complete darkness.Carbonox:- The Luminox Master Carbon Seal watch is made from a proprietary material called Carbonox, a carbon fiber reinforced polymer unique to Luminox. Using Carbonox was a natural choice as it is an extremely strong and lightweight material widely used in aerospace and other high performance industries. Luminox´s experience in creating watches that withstand extreme conditions, combined with the use of carbon fibers, led to the creation of the Master Carbon Seal watch.Specifications:Watch Details:- Function: Day date- Weight: 110 gTechnical Information: - Movement: Swiss automatic- Caliber: SELLITA SW 220-1- Battery: 50 months- Bezel: Unidirectional rotatingCase:- Case Material: Carbonox™- Case Size: 45 mm- Caseback: 316L Stainless steel screw in see through- Height: 14 mm- Water resistance: 200 meters / 660 feet / 20 ATMCrown & Glass: - Screw in with double gasket and crown protection- Glass Material: Sapphire crystal with anti-reflective coatingStrap:- Strap: Genuine rubber- Lug Width: 24 mm- Buckle: 316L stainless steel