From the library catalog:
With Kill a Watt you can cut down on costs and find out what machines are actually worth keeping plugged in. Simply connect your appliances to the Kill A Watt and it will assess how efficient they really are. Kill a Watt will count consumption by the Killawatt-hour, same as your local utility. With the help of Kill a Watt you can figure out your electrical expenses by the day, week, month or year.
At the Fremont Main Library, ask at the Information Desk, then use your library card to check out a Kill a Watt P4400.