All of these hair clippers and trimmers have their own specific voltage requirement; some operate only on Foreign 220 Volt while a few others are 110-220 volt Dual Voltage. Please read the listing descriptions to find out which ones are made for use Worldwide and which ones are made to run only in Foreign Countries overseas. "220v-240v Voltage" means it will only work in Foreign Countries overseas; "Dual Voltage" means it will work worldwide.