For divers, crystal clear water is ideal... and hardly ever the case. To allow divers, whether for work or leasure, to get the most from their experiences, they need to see and experience the underwater world surrounding them. The D14 Waterproof Flashlight has been tested to be waterproof up to 197 ft. (60 m.) Users get the benefits of clear, brilliant white LED light along with the energy efficiency-20 hours on a single set of batteries-for which COAST LED Lenser is well known.