Powerbright step up down transformer, power on/off switch, can be used in 110 volt countries and 220 volt countries, convert from 220-240 volt to 110-120 volt and from 110-120 volt to 220-240 (500w) Power Bright series of step up/down voltage transformers offers you a safe, reliable, affordable convenient solution to converting voltages from 110-120 volt up to 220-240 volt or from 220-240 volt down to 110-120 volt for both home use industrial applications. The VC500W is rated at 500 watts maximum. It features a heavy-duty cord with a standard US 3-prong plug plus a free American to German outlet plug adapter. There are a total of two outputs on the front panel. Two are grounded outputs, one designated for 120 volts with a US standard outlet and 220 volt only universal outlet. For safety, it's recommended by the manufacturer that the voltage transformer's maximum power should be equal or greater than the power rating of your appliance multiplied by 1.5. For example, if you have an appliance rated at 100 watts, you will need to pick a transformer with a maximum power of 150 watts or greater.