Bestop 75638-15 PowerBoard NX Retractable Running Board Set for 2009-2018 Dodge Ram 1500 & 2010-2017 2500/3500 Crew Cab & 2010-2018 Mega Cab w/o Air Ride Electrically powered running board hides stealthily underneath your truck when doors are closed and extends down to meet your foot when door opens No door wires are tapped and the interior of truck cab is not touched or altered as wireless components are placed in the door jambs which send wireless signal to central receiver that open or close the steps as needed Variable-mount LED light kit attaches to linkage or to body and illuminates board and ground below for easier access in and out of your vehicle more tools Patented high strength, die-cast aluminum linkages built to last in any climate with 600 pounds capacity per side.HOW IT WORKS: Wi-Fi modules attach to door jams and detect when any door opens or closes. They communicate to the wireless controller which then uses programmed logic to operate the boards independently Sturdy 6.25 inch wide aluminum running board features ultra-durable, non-slip, powder-coated surface