This Marine Solar Strobe Light provides reliable day and night signaling for boats and waterfront facilities. It automatically shuts off in bright daylight and flashes when light is low, converting sunlight into power for continuous visibility. Easy to use. It automatically extinguishes in bright daylight and flashes in low light to provide clear signaling. Builtin battery and LEDs. It includes an 1800mAh lithium battery and brightness LED beads, delivering a visible flash for more than 20 days after a full charge. Robust and dependable. The housing is transparent PC with two waterproofing steps, a rubber gasket, and thread gluing to resist salt and alkali exposure. Improved solar panel technology. Polycrystalline silicon solar panels enhance energy absorption and storage efficiency for reliable operation. Applications. Use on a boat mast for night signaling, on buoys or channel markers to improve visibility, or at docks and piers to mark moorings or restricted areas.