This is the Attwood XFS Portable LED Navigation Light. Built just for marine applications. Features water-resistant LED lighting for truly marine-grade operation. Sealed electronics, a sealed and shockproof composite housing, and a shatterproof polycarbonate lens provide rugged dependability. 3 AAA batteries (not included) provide up to 150 hours of operation. This boat navigation light mounts with an extra-heavy-duty C-clamp and kayak pad for quick and easy use in all types of boats as well as kayaks and inflatable vessels.