From website: Measure and record your power usage, monitor electricity cost and view greenhouse gas emissions off a connected device
I use a similar device, Doss branded from Radio Parts.
http://www.radioparts.com.au/ProdView.aspx?popup=1&Category=…
They are good value to see where you are using all that power.
Its surprising what just gets consumed in "stand-by"
i bought one early last year. it seemed to work ok. however, when the temperature was hot (30+ degC?) the plastic covering the display went rainbow coloured and i could not read anything. it went back to normal when it cooled down. several months later some digits on the display stopped working and at that stage i took it back and got a refund.