These Woodburning tools aredesigned to operate Internationallywith 220/240 Voltage. These units will not operate correctly in the United States or other countries that use 120 Voltage. Please visit our page 'Woodburning Units' for models that work in the United States. For Kits available with International Units, please visit the 'International Kits' subsection of the 'Woodburning Kits' section.