Firstgear Dual Heat-Troller 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. Portability allows use on more than one 12-volt DC motorcycle or ATV. 3yr limited warranty