You will need a Step Down voltage transformer if you want to use 110 volt USA products overseas. A step down transformer is needed to decrease the incoming 220 Volt electricity found in most parts of the world to 110 Volts USA power. Our heavy duty CE Certified 220/240 volt to 110 volt step down voltage transformers are grounded and can be safely used continuously for 110 Volt American products in countries with 220v power supply. NOTE: These transformers will not Step Down USA 2-Phase 220/240 Volt power to 110 Volt.