Applicable devices: Air conditioner, refrigerator,freezer,washing machine,TV set,computer,electric water heater,clean cabinet and other electric appliances. 　　Applicable places : family, shop, supermarket, shopping plaza,hotel,dining room,boite,guesthouse,beauty parlor,feetcaring center,massage room, office and so on . 　　The customer can choose to use the energy-saving unit of different types according to the amount of the equipment,with the size of the electricity. Load heavy should have odd more multi-purpose.