An induction heating device having an adjustable heating power output includes at least one resonant circuit, which includes an induction heating coil, and a heating power adjusting device, which is designed to vary a resonant frequency of the resonant circuit in order to adjust the heating power output. Various accessories, such as stands, cord spools, mounts, communication devices, speakers, displays, etc. The processing system includes a rule-based system that preferably insures legal compliance in the areas of product selection, payment and delivery.