QC 3.0 Fast Charging Voltage and Current Display USB Data and charging cable is very good value for the money. It well cooperate with QC3.0 and QC4.0 power suppliers and really ensure fast charging on the device which support it. When I have used this QC 3.0 power supplier with normal I phone cable the charging wasn't fast but normal. I recommend this cable. the info about charging voltage and current is very usefull.