The Kill-A-Watt EZ is the big brother to the Kill-A-Watt. It has all the features of the Kill-A-Watt but also includes the ability for users to energy their kWh rate so they can see what appliances cost them to operate (without having to do the math themselves). Power cost information is retained by a battery backup.
In this same price range, but with the added option of an extender cord for viewing hard to reach outlets is the Belkin Conserve Insight Energy Cost Monitor.
