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 g Technical Information: - Movement: Swiss automatic - Caliber: SELLITA SW 220-1 - Battery: 50 months - Bezel: Unidirectional rotating Case: - 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 ATM Crown ; Glass: - Screw in with double gasket and crown protection - Glass Material: Sapphire crystal with anti-reflective coating Strap: - Strap: Genuine rubber - Lug Width: 24 mm - Buckle: 316L stainless steel