P3 International Kill A Watt EZ Electricity Usage Monitor – Link
Amazon has this currently marked down to its lowest ever at only $19.99.
Plus, if you are a Prime member, you can choose no-rush shipping at checkout, for a total of $19.35 after $0.64 discount.
- Calculates cost and forecasts by week, month, and year
- Displays eight critical units of measure on the large LCD display
- Built-in backup of accumulated information.
- Accurate within 0.2%
- Calculates cost and forecasts by week, month and year