PowerBoard NX for JK Wrangler by Bestop
Bestop PowerBoard at CARiD.com:
Bestop PowerBoard running boards extend down automatically in about one second when you open the door, to give you an assist in and out of the cab, but retract and hide underneath when the door is closed for a clean look and to give you the ground clearance you need.
More Bestop Products:
All Running Boards: