- From the Prospex Collection - Solar diver's watch - Powered by light energy - no battery change required - 10-month power reserve once fully charged - Blue uni-directional rotating elapsed timing bezel - Blue sunray finish dial - Date calendar - LumiBrite hands and markers - Sapphire crystal - Screwdown crown and caseback - Case diameter: 38.5mm - Stainless steel case and bracelet - Tri-fold push button release clasp with secure lock and extender - Water-resistant to 200 meters (660 feet), Diver's Watch. Follows ISO standards and is suitable for scuba diving - Caliber V147