Consumers have depended on the Kill A Watt and the Kill A Watt EZ for years to help them save energy and money. Now with the new Kill A Watt Edge it is easier than ever to gain insight on your consumption with the added experience of new features, for both the average and technically savvy consumer. CO2 Function to calculate Carbon Footprint; Dual display; Calculates consumption and cost of your devices when left in standby mode