HP ProBook 450 G6 Notebook USB ports

[bony7top]

Hello HP Community, 

I own a HP ProBook 450 G6 and i would like to ask about its usb ports. I tried to find an answer on the internet but nothing was clear, therefore i thought of trying the experts. 

The laptop has :

• (1) USB 3.1 Type-C Gen 1 (Power Delivery, DisplayPort)

• (2) USB 3.1 Gen 1

• (1) USB 2.0 (Powered port)

• (1) HDMI 1.4b

• (1) RJ-45/Ethernet port

• (1) Headphone/microphone combo jack

• (1) AC power port

My questions are for the usb 2.0-powered port. I understand that the usb 2.0 powered port (which has a physical "+" sign on the side) has different voltage output. Could you please let me know what is the difference on the usb ports regarding the voltage/current outputs.

Additional i would like to ask is there a risk of damaging my devices connected to the "usb 2.0 powered port"?

Last but not least i would like to ask, in case there is a major difference on the usbs' voltage/current outputs and there is a risk of damaging my devices; whether is possible to change the amount of the voltage outputs from each usb port. 

In conclusion what is the recommended use for the usb 2.0-powered port?

Thank you in advance.