Great for lobster fishing or any other uses where a flashing light is suitable for marking a location Internal light sensor turns it on in dark, off in daylight To manually turn off in dark condition -- Partially unscrew the lens or remove the batteries O-ring seal and the body of the light is a sealed single plastic housing Water-resistant, ideal for buoy attachment, not for prolonged submersion Long Battery Life: Over 200 hours, efficient circuitry powered by 2 AA batteries Standout Flash Pattern: Features a unique flashing pattern of TWO flashes per second amplified by an advanced Fresnel lens for enhanced recognition Visibility at night is close to 3/4 mile depending on conditions affecting visibility Used in multiple lobster fishing locations across SoCal for many years Cold Water Capable: Earned positive feedback for functionality in the challenging sub-zero waters of Alaska Perfect for marking lobster hoop nets and any night time fishing, these LED strobes are visible from 3/4 to 1 mile in optimal conditions. They serve as a critical tool in locating your valuable gear should it drift away. They are designed with a smart daylight sensor for efficient use, ensuring over a week of continuous operation on fresh batteries. These lights are not meant for submersion. They integrate seamlessly with lobster buoys, enhancing your fishing efficiency.