The HYDRACELL Shark Waterproof Light is a rugged and powerful LED portable flashlight powered by two proprietary HYDRACELL HC2D water activated battery fuel cells. Bright, long-life LEDs and a special reflector provide a powerful focused beam for applications needing robust hand-held lighting. The SharkLight is perfect for many applications as an emergency torch/flashlight in your home, on your travels and in your survival kit. Easily activated by dipping in sea water, if required. The Shark Waterproof Light is designed to be stored indefinitely and when required simply Rip open the vacuum seal, Dip the whole product in water for fifteen seconds and Shine by switching the light on for hours of functional light, up to 300 m. The SharkLight is waterproof, floats in water, and has a built in emergency flashing / strobe function.