From the Manufacturer
The cost of electricity is soaring but you can help reduce your energy costs with the new Kill A Watt EZ. Simply plug it into a wall socket and then plug in your appliance to assess how efficient they really are. The large LCD will display the power consumption by the kilowatt-hour and the built-in memory retains accumulated readings when power is interrupted. Program in your local utility rate and display projected costs by hour, day, week, month, or year. Evaluate the quality of the electrical power provided from your utility company by monitoring voltage, line frequency (Hz), and power factor (VA). Perfect for detecting voltage drops and brownout conditions before they damage delicate equipment. The knowledge you gain from Kill A Watt EZ can save you thousands of dollars.
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. The large LCD display will count consumption by the Kilowatt-hour, same as your local utility, letting you calculate your cumulative electrical expenses and forecast by the day, week, month, even an entire year. Also check the quality of your power by monitoring voltage, line frequency, and power factor. Now you’ll know if it is time for a new refrigerator or if that old air conditioner is still saving you money. With the amazing Kill A Watt EZ you'll know "watts" killing you.