Belkin Conserve Insight F7C005q Energy-Use Monitor for $28.99. Shipping is free on orders over $35. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for your reference. It shows how much different devices cost to use on a yearly or monthly basis, power plant carbon dioxide emissions (carbon footprint) from using devices, and monitors actual device usage over time and projects the dollar impact on electric bill. Most places have it for about $40.