You can add to cart the AC 110 / 220 Volts Step up/down: 2000 Watts if 220V is needed. NOTE: If your power supply is 220V and you connect the NUBE unit to it, UV bulb 1 will burn out; this is not a factory defect but rather a result of providing excessive electricity to the equipment. Therefore, you must use a 110/220 transformer for countries with 220V electricity, as the unit is designed for 110V.