Clamp-On Mount L.E.D. Advantage means low power draw, batteries last longer than standard incandescent bulbs. Easy to store. Compact size takes up less space on deck. Certified USCG 2nm, for use on boats under 23′ (7 meters) with a maximum speed of 7 knots (8 MPH). Clamps vertically or horizontally for maximum flexibility. Includes: Clamp-on mount and fasteners. Requires (3) “AAA” Batteries (Not included).