P3 Kill A Watt Electricity Usage Monitor with Large LCD Display (P4400)Choose from the Kill a Watt's four settings to monitor your electrical usage Monitor your electrical usage by day, week, month, or year Features easy to read screen 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 2. 0 percent accuracy Compatible with inverters;