If you are in a location where voltages fluctuate, the Accu Floss may be the ideal machine for you. When voltage is too low the patented Accu Floss control automatically adjusts the voltage so you are making perfect cotton candy. If voltage is too high the control will bring the voltage down to the proper level. Great for rental locations where voltage supply is unknown. Once the unit is on location and set up you should not have to adjust the controls. Making cotton candy has never been easier.