Description: 100% Brand New Voltage: 12 V Dimensions: 4" Diameter Function: Waterproof, great for marine or trailer applications LED Light: 12 LED super diodes Material: Polycarbonate housing with rubber grommet Wiring Information: 3-prong connector, includes 3 lead wires (for each light) Lights are lab-tested for brightness and to withstand vibration, wet conditions, movement Weather resistant: built to handle big weather temperature variations great conductivity and durability. Designed tough and ready to handle harsh weather and road vibrations. Includes 4 Round Red Submersible 4" Trailer Lights Professional Installation is Highly Recommended (No Instruction Included)?? Wires connections: White Wire is the the negative pole; Red Wire is the Brake Light; Black Wire is the Driving Light Fitment: Universal fit vehicles with DC 12V Such as Trucks, trailers, tractors, semi-trailer, dump truck, bus, boat, special vehicle, etc. For Heavy Duty trucks like Peterbilt, freightliner, international, Kenworth, mack,etc. Package Including: 2X 12 LED stop/turn/tail Lights As the picture shown