Extend-a-Light Manual Stern Light Operates 12 Volt DC systems For powerboats under 20 meters (65.6 ft) Single LED configuration 50,000 hours LED service life Energy draw 350 milliamps Vibration and Shock proof Sealed circuitry Requires 1 3/4 (1.75) Hole Corrosion resistant construction Durable stainless steel telescopic pole Easily installed on new and used boats No change in current switch required Certified ignition protected IMCI certified for ISO #8846 Easy Pull-Up/Push-Down hand operation Requires 20.25 inches gunnel depth 2.36 diameter deck ring 20.25 below deck Height: 6\'