Advanced digital microprocessor controlled unit. Fully digital microprocessor control Precision regulated set point voltage 0-18volts 2.3 amp built in overload protection User selectable resolution .1, .2, or .5 volt increments Time of day Stop-Watch Liner/ Shader presets now with 2 machine or 4 machine memory modes. Foot pedal can be set up as Momentary or Maintained: Momentary (press foot down to power on, lift foot up to power off) Maintained (press foot down once to power on, press foot again to power off) foot switch modes. Easy one button toggle between modes. Non volatile memory (holds time and presets even when power is removed) Wireless foot switch ready (sold separately) Universal input 110-240vac 50/60hz, Excepts standard clip cord and foot pedal connections LCD digital display shows: Volts, Amps, Speed (HZ), Duty Cycle (%) Wipes down easily, and easily bagged with typical machine or bottle baggies Power supply includes 4 suction cup feet and 4 magnetic feet. Includes 6 foot regular clip cord and foot pedal Power supply comes with Tattoo U Supplies Machine and Power Supply Warranty Comes with: clip cord, foot pedal, Stand, AC Power Cord for USA or Europe, Four Suction Cup feet or Metal Feet with Magnets, and Manual.