Work as described, great item, fast delivery. Thank you, now, I'll have fun with it, to understand everything. I recommend.
Seem to work fine as a cv/cc source, but is very janky as USB tester. It doesn't show what profile was chosen by connected device and sometimes just refuses to work and goes into bootloop as soon as device is connected. Be careful when connecting USB devices to its output ports. If you select any profile other than 'None' on the profile page it will output selected voltage on output usb ports (i.e. you select PD 20v and connect 5v device - it is going to fry it).