Electrical outlet in most of Europe including Austria, Germany, and Switzerland is 220-240 volts, twice the standard voltage in North America. A normal 110/120-volt electrical appliance are designed for use in the US or Mexico.
If you are traveling to Germany and Europe you want to bring electrical appliances or devices from North America. You will need a Voltage Converter for your electronics (laptop computers, cameras, iPods, etc.) and large appliances, TV sets, and anything else that doesn’t run on batteries.
There are many kinds of voltage converter, you can go to 110220Electronics.com to buy them.