The Sea Bass boasts a robust 44mm CARBONOX™ case and offers water resistance up to 100 meters. Its black dial with white numerals ensures excellent readability in daylight, while the Luminox Light Technology provides continuous illumination at night. This "Always Visible" system is self-powered and lasts up to 25 years. - Swiss Quartz - Approximately 50 Months Battery Life - Constant glow for up to 25 Years - 44mm Case Size - 12mm Case Thickness - CARBONOX™ Case - Polyurethane Strap - Mineral Crystal - 100 Meters Water Resistant