Features and Benefits: Complete control of Window Regulator without jumper leads. Rocker switch reverses polarity with 1 hand. Thermal fuse to protect modules and components. Headlight lights up working area. Complete with probes, alligator clips, and wire piercing clips. The Regulator Activator is a patent pending device that gives a body man complete control of the window regulator. Unlike the present way of bringing hot wires into the door panel, the RA gives the technician complete control with a rocker switch for changing polarities while protecting components with thermal fuse. It will also activate other 12 volt systems like heater fans etc. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.