Step Up/Step Down transformer converts 220-240 volts down to 110-120 Volts or 110-120 volts up to 220-240 volts. - Item Dimensions: 5 Inch H x 6 Inch L x 4 Inch W.Simultaneous 3-Mode Output: 5V (USB)/120V (Standard US outlet)/220V (Universal outlet).Four input voltages selectable: 110V/120V/220V/240V.All-Range fuse protection with two spare fuses included..Comes with universal European power adaptor.