This item supports Qualcomm QC3.0 and is compatible with QC2.0 protocol, you can decoy 7V / 9V / 12V / 20V and 4 ~ 12V of QC3.0 and other fast charging voltage out to do aging test and quality identification.
MODE: Press once to cycle switch between QC2.0 and QC3.0 mode
UP / DOWN: Press once to send an increase or decrease protocol, press twice to send continuous increase or decrease protocol, both of these have the memory funtion when power off, under QC3.0 mode, voltage is increase or decrease by 0.2V with each single press.
This item only decoy the voltage of QC3.0 products to indentify whether the chargers or power banks are real QC2.0/3.0 products or not, please do not use the output voltage to charge your phone directly, or it will do damage to the phone.
1 x JUWEI Voltage Current Tester