Ratio FreeDiver Helium-Safe 1000M Sapphire Automatic 1068HA96-34VA-GRN Men's Watch This wrist device that goes by the name of freediving watch gives a couple of useful information to the wearer. It tells you the time with near-quartz accuracy; for how long you are performing a task or how long before your time runs out. Made from quality materials and running on a quality movement, it has been made to withstand harsh conditions amidst cold, salty oceans and chlorinated pools alike.