Prospex Solar Analog-Digital Special Edition Diver's Watch Special Edition inspired by the blues and greens of a tropical lagoon Powered by light energy - no battery change required 6-month power reserve once fully charged Chronograph function Marine blue and green uni-directional rotating elapsed timing bezel Black dial with green accents Digital time, date, dual time and alarm indicators LumiBrite hands and markers Screwdown crown, pushers and caseback Case diameter: 47.8mm Lightweight matte black case inspired by the iconic H558-5000, the world's first analog-digital solar diver's watch with a chronograph and alarm Blue silicone strap Water-resistant to 200 meters (660 feet), Diver's Watch. Follows ISO standards and is suitable for scuba diving Caliber H851