Pre-Wired Switch Boxes from Buyers Products offer simple control of your truck's high powered auxiliary electric devices. Available in a 4 or 6 function button layout, they can be easily installed under your dash and labeled for each use with the included labels. Featuring a higher amp relay, concealed wiring, and one dedicated fuse per switch, the 3 or 5 switches run up to 20A. There is one 40A switch per box. The rocker switches are back-lit in the ON position.