I have several devices of this type on eBay, Aldi, Lidl etc. acquired. All had to be very inaccurate and the disadvantage to require a battery. Quite different this device. No cumbersome Hantiererei with button cells, no fancy details, no inferior processing. This is a great, well-made device with absolutely realistic consumption figures. Even if the price is above the China equipment that better processing and higher accuracy is the difference in price twice value.