Features:

• Electricity usage monitor connects to appliances and assesses efficiency
• Large LCD display counts consumption by the kilowatt-hour
• Calculates electricity expenses by the day, week, month, or year
• Displays volts, amps, and wattage within 0.2 percent accuracy
• Compatible with inverters; designed for use with AC 115-volt appliances

Editor Reviews:

Product Description:
Connect your appliances into the Kill A Watt, and assess how efficient they are. A large LCD display counts consumption by the Kilowatt-hour just like utility companies. You can figure out your electrical expenses by the hour, day, week, month, even an entire year. Monitor the quality of your power by displaying Voltage, Line Frequency, and Power Factor

Rating : - Works as advertised, highly recommended
With rising energy costs, I wanted to know where my Kilowatt Hours were going to, this product has helped immensely. If it plugs into a wall, it can be plugged into this unit. I would leave it attached to various appliance for a few days each to see how much energy each device was consuming.

Highly recommended!