LED Tow Lights With Magnetic Base- 30' cable - Weather-Proof - 12VDC - Custom Trailer Plug(-Amber-4-Pin Round) Magnetic mount beacon is battery powered and provides 50 hours of operation on a single set of 4 AA This Fixture is designed for heavy duty use in applications where intense vibration and Corrosive environments may be encountered The hdfl-aa beacon is waterproof and resistant to shocks and vibrations Operation of this unit is controlled by a simple rocker switch located on the side of the housing Has no need for wiring or external power sources & produces a brilliant signal visible over 1 mile