It is the board that moves. Automatically extends down when you open the door, then retracts smoothly and tucks up underneath the body. You get OEM look, function, reliability but for less than factory boards. Details: Fits: 07-17 Jeep Wrangler JK Unlimited 4-Door Electrically powered running board hides stealthily underneath your truck when doors are closed and extends down to meet your foot when door opens Drops down about 6 inches and out 2 inches to create a stair-step into your truck Full length board works with both front and rear doors, driver and passenger sides 600 pound load capacity per side Complete kit includes two full length boards, OEM quality sealed motors, controller, hardware, wiring bundle with weatherproof connectors and LED Light kit Built-in anti-pinch safety features senses pressure to keep board from retracting on your hand and feet Patented high strength, die-cast aluminum linkage built to last in any climate OEM quality sealed motors that perform in any weather OEM quality heavy duty wiring harness with weatherproof connectors Sturdy 6.25 inch wide aluminum running board features ultra-durable, non-slip, powdercoated surface Integrated LED Light Kit mounts to linkage or to body and illuminates board and ground below for easier access in and out of the cab 100,000 mile/3-year limited warranty Black Powdercoat Finish Sold As A Set Components: Wireless components placed in door jambs Signal travels to central receiver, which signals controller to open or close Powerboard Wiring Harness: Nothing goes inside the cab (NX only) Fewer headaches for installers, as no door panels, carpets, or kickplates are removed, no digging into the dashboard Motor: Usually we try to make things quicker, but we discovered that slowing down the board made it more elegant, more refined, more like the OE boards It also gives kids a bit more time to get in the back doors Linkages: Our engineers increased the diameter and added gussets to the motor mounts to make them even stronger Wedge Block: Small changes count. Wedge blocks now feature a larger clamping surface with the clamp bolt threaded in place to eliminate slippage