The 12 Volt Magnetic Trailer Light Kit is ideal for use with any RV, trailer or car. Scratch-free magnetic base mounts effortlessly on nearly any vehicle. Lights are excellent for towing use up to 80 inches wide. Kit operates on 12 Volts and includes a 20 foot wiring harness with standard 4-pin connectors. Safely transport your trailer with these easy to use magnetic trailer lights from Trademark Tools.