Powerful LED taillights, DOT / FMVSS108 compliant, full brake, turn signal, and hazard light functionality. 4-Flat to 4-Square pin accessory included. Uses 4-Flat connection to connect to vehicle power. Wiring designed to fit within MHS Base to keep wiring out of the way. For MHS Base only - two component lighting system designed to be installed on any MHS Base. Can remain installed while MHS System or vehicle is not in use.