Kill-a-watt devices help you analyze how much an appliance contributes to your utility costs, the best times of day to use that appliance, and basically how to be more energy efficient and save money. A number of electric companies are lending them to their citizens but since these businesses dont have a good lending service in place, some are turning to libraries to lend for them. In southwest colorado, several libraries including Cortez and Mancos Public Libraries are now lending these devices to their patrons. I bet other libraries are doing this now too. cool, eh?