Battery Navigation Light. Requires 4 AA batteries (not included). Molded one piece body construction. Shock resistant neoprene accents. Incandescent or LED available. 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" WARNING: This product can expose you to chemicals including BISPHENOL A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.