Convenient to Use Marine Navigation Light automatically flashes at night or on overcast days, and is powered by solar energy for uninterrupted operation. Built-in Battery 1800mAh lithium battery with high brightness LED beads provides a prolonged visible flash for over 20 days of continuous use once fully charged. Dependable Design Constructed with a transparent PC housing. Uses double waterproofing with a built-in rubber waterproof gasket and thread gluing, delivering strong protection against salt and alkali exposure. Enhanced Solar Charging Capability Equipped with polycrystalline silicon solar panels to maximize energy absorption and storage efficiency for reliable performance. Key benefits and features - Function: automatic flashing navigation light for marine use, powered by solar energy. - Battery: 1800mAh lithium cell supports extended visibility after full charge. - Performance: high brightness LEDs deliver a clear flash for long periods. - Durability: transparent PC body with dual waterproofing guards against harsh sea conditions. - Materials: polycrystalline solar panel for efficient charging. - Environment: designed to withstand salt and alkali exposure typical of marine settings. Use scenarios - On a small boat or yacht at night or during fog to mark position and improve vessel visibility. - At a dock, marina, or mooring to clearly indicate safe passages or berths. - Fixed to buoys, channel markers, or breakwaters to maintain visible navigation aids in variable weather.