This flashlight is amazing for underwater, as well as on land. The TOVATEC Fusion 1000 operations underwater at 328 ft./100m and and lifetime CREE LED bulb with 1000 lumen for brightness when you need it most. Made with durable aircraft-grade aluminum, this flashlight has a magnetic slide switch and a lithium-ion rechargeable battery. This is an excellent addition to any scuba diver's supply kit for or the person in a hurricane prone area. Whether you are on an expedition or in a disaster emergency such as Hurricane Harvey in 2016, the TOVATEC Fusion 1000 will have the light ready to guide you. A must have for any hurricane survival kit.