|Are your utility bills going through the roof? Track energy consumption with the Kill A Watt Usage Monitor. An LCD readout displays energy consumption by the Kilowatt-hour with a 0.2 percent accuracy rate and monitors voltage, line frequency and power factor. You'll save on electricity once you have identified and replaced or changed your usage of "energy-guzzling" devices. Helps to track and budget electrical expenses by the hour, day, week, month, even an entire year.