motherboard USB headers (internal splitting) 2-> total headers

[FinOxy]

https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/ROG_STRIX_B550-F_GAMING/E16609_ROG_STRIX_B550-F_GAMING_UM_WEB.pdf

I just looked at my motherboards manual (linked on top), and there is a marking at internal IO section, that the 2 headers can output total of 4 ports
How does this work?

 

[SupaKomputa]

Each header can have 2 usb connection. So 2 headers 4 port.

[FinOxy]

How would this be done in practice?

 

[The_Hawkeye]

For USB 2.0 you mean? If so, you buy this (or similar): https://www.amazon.de/gp/product/B00DKWY1H8/ref=ppx_yo_dt_b_asin_title_o04_s01?ie=UTF8&psc=1