Effortless solar charging: Converts sunlight to electricity for storage, ensuring continuous energy; flashes in low-light conditions for effective lighting all day. Built-in battery and LEDs: Built-in 1800mAh lithium battery and high-brightness LED beads provide prolonged visible flash; over 20 days of continuous use on a full charge. Durable, weather-ready design: Transparent PC housing with double waterproofing using a built-in rubber gasket and thread gluing; protects against salt and alkali exposure. Efficient solar charging: Polycrystalline silicon solar panels maximize energy absorption and storage efficiency for reliable performance. Use scenarios: - On boats, ships, and kayaks for night signaling and hazard visibility. - On mooring buoys, markers, and floating pontoons to maintain conspicuous signaling in coastal or harbor environments. - As standby emergency lighting on decks, docks, or coastal installations where reliable visibility is required.