Deluxe Power Pack 3 Positions Input Voltage of 7-24 V AC/DC Output Voltage of 2.6-5.5V, 1.2 Amp Voltage ramps up to improve bulb life Activation with Positive or Negative Air Pressure 10 Preset Output Voltages (No Meter Required) Instant on and adjustable delay settings Powers up to 3 Handpieces Small Compact Size: 3 1/8" x 2 1/4" X 1"