Feature●Great for Lobster, Crab hoop net fishing or any other uses where a flashing light is suitable for marking a location●Intended to be inserted into a lobster buoy, not for continuous submersion●Off during the light of day by means of the internal sensor but to turn it off manually you can partially unscrew the lens or remove the batteries●O-ring seal and the body of the light is a sealed single plastic housing●Visibility at night is close to 1 mile depending on conditions affecting visibilityDescription