SS630 100 Watts Step UP and Down Voltage Transformer New Compact Design Easy plug and play operation Perfect for laptops, Camcorders, Cell Phones, CD players, boom boxes, PSP, PS2, VCRs, Blu-Ray DVD players, DVD recorders, VCRs, etc.. -Auto shut off function in case of over load. - Allows you to use American small low wattage 110-120 volt items outside the USA and also use overseas 220-240 volt items in the USA, North America, etc.. Can work as a Step Down Transformer or Step Up Transformer just by changing a switch on the unit: Step Down Function: Converts 220/240 volts down to 110/120 volts