Clark Pads Xtreme-3D builds on our bestselling Gen 2 and Gen 3 Universal power pads. CPX-3D offers a deeper fit on your foot and leg, providing greater control and comfort in extreme technical riding situations. CPX-3D are expandable, to offer flexible mounting options. Remote-controlled LED inserts add visibility and style to your ride. Purchase includes a set of two pads and LED remote. Each LED puck insert includes three AAA batteries.