This EU TO US plug adapter is perfect for devices from foreign country - Convert Plug from Europe (2 round pin) to USA (flat pin). Compatible with smartphones, laptops, shaver, lights, hair dryer, straightener, curlers, toothbrush, curling iron and more. Ideal for electronics from abroad or hosting foreign friends at home. Attention: This product is plug converter, not voltage converter. Please check your devices before use make sure they support 110V-240V dual-range input, otherwise you may need a voltage converter. It's an adapter. It lets you use a device that has 220V prongs (European style) on the power plug to adapt to USA type 110-120 volt prongs. If your device with a 220V plug will work on both voltages, this will allow you to use your device on a standard USA wall outlet. Be careful that if you need to adapt a USA type cord to 220V, this is not the correct one to buy. But remember to check to see if your USA 110-120 volt device can work on 220V before doing that. Many devices nowadays are dual voltage types but check first.