Battery Navigation Light. Requires 4 AA batteries not included . Molded one piece body construction. Shock resistant neoprene accents. Rated at 100,000 hours LED service life. LED uses 90% less energy than incandescent. Sealed heavy duty On/Off switch. Insert molded brass threaded mounting bushings. Removable lamp carriage assembly. 6.18 x 2.53 . Mounting style Inflatable 2 pole, lanyard Requires 4 AA batteries not included . Molded one piece body construction Shock resistant neoprene accents. Rated at 100,000 hours LED service life LED uses 90% less energy than incandescent. Sealed heavy duty On/Off switch Insert molded brass threaded mounting bushings. Removable lamp carriage assembly 6.18 x 2.53 Mounting style Inflatable 2 pole, lanyard