The APW 55564EGO Infinite Switch 15 AMP 120 V is used to control the amount of electrical power flowing to a heating element by controlling the on and off cycle of electrical power. It operates by enabling the operator to adjust the incremental levels of heat, which are held by the switch, using regulated electrical intervals. This is commonly fitted into commercial foodservice equipm... https://partsfe.com/55564ego-apw-infinite-switch-ego