Among those who use Cat Power are Bob Tyrell, Robert Hernandez, Tin-Tin, and Paul Booth, and many more ... automatic recognition from 110 volts to 220 volts. 10var potentiometer for fine tuning. Perfect power supply to take with you to the fair.. operates from 1 to 15 volts. 3 amp output. Automatic transition from 110 to 240 volts Jack plug socket automatic recognition of the foot pedal and clip cord.