I just ran across this yesterday and I want one! You plug it into an outlet and then plug an appliance or some other electric device into it and it then tells you how much energy is used to run that device. Not only does it tell you how much energy is used but it also allows you to input your price per Kilowatt-hour (as charged by your utility company) and it will then tell you how much it costs to run that device per day, week, month, and year. By using the Kill A Watt EZ you can measure energy draw when devices are in use or when they are not being used but are still plugged in. This might give you incentive to go to the trouble of turning off that power bar to your entertainment center or computer but perhaps not unplug your alarm clock every day if it only costs 11 cents a month to keep plugged in 24/7. It might also be a boon in a home with older kids and teens who think they need their own computer and TVs… the real cost of running these things would be helpful to know.
I only wish it was compatible with 220V plugs because I would love to test my dryer and hot water heater.
