Dial Dual ControllerDual Temperature Controller The Dual Dial Controller has two circuits, one for the jacket liner and the other for the rest of your gear. The dials are used to vary the heat on your gear. The controller can be set at 10 percent increments. The grey knob is paired with the white, taped plug and controls the jacket liner. The black knob is paired with the glove plug in the jacket. CAN BE USED WITH GERBING PRODUCTS CAN BE USED WITH OLDER HARLEY HEATED