DIY KYOTO’s Wattson is finally ready to meet the world. The Wattson instantly reads how much electricity you use either in Watts or amount of money it is costing you. The information is gathered and stored from a transmitter that you attach to your electric meter or fuse box. With its mood LED, it changes colors depending on how much energy you use, with blue for less and red for high consumption. It also features an internal battery pack to make it portable.

Although it has been out for some time in limited release, the device was recently upgraded to show energy usage in Euros, Dollars, Stirling, Yen, and Pounds. Both Mac and Windows compatible, Wattson is available for £149.50 ($297.00.) A bit pricey, but well worth it when you consider the guilt factor.