Purpose of purchase - know the consumption of my power boiler to evaluate the ROI of any system thermal panels or a heat pump. No worries, super simple programming - rate setting options and overconsumption (that I do not use personal) Clear display. Precise current pumped to 0.01 A. As usual, delivery and packaging OK. Good value for money A small downside though - attention to the usage limit I - 16A is 3000 W max. (Just for my application)