The Mini Digital Power Unit has all the features of a heavy duty power unit. It has a magnetic backing which allows you to attach the unit to any metal surface. It also has a built in on/off switch to act as a foot pedal.Voltage: 1 to 18 volts adjustable using adjustment knob and can be fine tunes to 1 decimal.Machine Connection: You can connect 1 machines and only has a phono plug inputs.On/Off Switch: This unit has a built in On/Off switch if you did not want to use foot pedal.b>Foot Pedal: Can be connected to any foot pedal with a phono plug connection. You dont need a pedal to run the machine.Digital Display: Bright digital display that shows your voltage to 1 decimal.Size & Weight: The power unit weights 10 oz and size is: 3" x 2.75" x 2.25"Items included: Power Unit, Wall Adapter. Specifications: Voltage Range: Adjustable up to 18V Precision Control: Fine-tune up to 1 decimal place Weight: 9.5 oz AC Compatibility: 80V-250V