Designed for 1 person to variably control heat separately to multiple garments such as a jacket liner and gloves. It can also be used to balance the heat between any set of heated garments, such as jacket liner on 1 control and gloves, pants and socks on the other. Each rider must have their own Heat-Troller™. Designed to be mounted to the vehicle. Requires drilling of holes for switch and L.E.D.