The P3 International Kill A Watt EZ Energy Monitor monitors electricity consumption and features a built-in battery backup large LCD display and shows the operating costs of your household appliances. Now you can cut your energy costs and find out what appliances are actually worth keeping plugged in. Simply connect these appliances to the Kill A Watt® EZ and it will assess how efficient they really are. Large LCD display will count consumption by the Kilowatt-hour same as your local utility.