This wireless LED Tow Bar is ideal for towing larger vehicles like buses, box trucks and tractor trailers to let other drivers see your turn and brake signals. Simply plug the transmitter into your truck's connector. The transmitter "tells" the bar to follow the tow truck's signals. Features bright LEDs that only come on when the towing vehicle's taillights are on to save the battery. Transmitter instructs the tow bar to follow the tow truck's signals for better visibility on the road. Mounts with included rubber cords. Includes 7-way round transmitter and charge cord.