Plug the transmitter into your truck’s socket, strap the Wide Load Bar ontothe disabled vehicle using the (4) supplied rubber straps and flip on theswitch. The bars have a 1,000′ range and run up to 10 hours on a single charge.To recharge, use the supplied 7-way round plug included with the bar. Durable plastic housings won’t rust, warp or crack 7-way transmitters (3) 2″ marker lights add extra visibility 12V DC Replacement Charge Plug Part Number: TMCC-7PN 8-1/4″H x 3-1/2″D