LABPSHH01, It is not possible to set the in USB power-chargi

Hi, I received from you last Friday a LABPSHH01

In the manual it says

Press the USB button to enter the USB power-charging mode. Adjust the voltage to 5.2 V and the current to 3 A. Press the OUT button to use the device as power charger. Press the USB button again to exit the function.

The Voltage is not possible to chose……

I can’t get the function to work

How to?

Thanks

You should post your question in this link.
http://www.velleman.eu/support/contact/?product=432308