THE SUD SERIES STEP UP/STEP DOWN TRANSFORMER CAN BE USED FOR A VARIETY OF APPLIANCES: *Household appliances like fridge/refrigerator,freezer,TV,hifi sound system,electric fan,etc *Small office equipments like computers,fax machines,etc *Air conditioner (choose model rated 3000VA or 5000VA or more bigger depending on the size of your air conditioner) *And/or any other electrical or electronic devices which need voltage to be converted to 220V or to 110V