From the Coutura CollectionSolar perpetual calendar alarm chronographPowered by light energy - no battery change required6-month power reserve once fully chargedPerpetual calendar adjusts for odd and even months, including leap years, until 2100.Chronograph measures up to 60 minutes of elapsed time in 1/5-second increments with split time measurement functionAlarm functionSilver sunray dial with blue subdials and accentsPower reserve indicatorLeap year, month, day and date indicator24-hour subdialLumiBrite hands and markersSapphire crystalBezel with blue ion finishScrewdown casebackCase diameter: 44.0mmStainless steel case and braceletCabochon crownWater-resistant to 10 bar, 100 meters (330 feet)Caliber V198