It offers 4 40GBps Thunderbolt four ports (suitable with USB-C, Thunderbolt 3 and Thunderbolt four) in addition four 10Gbps USB-A ports. Among the list of TB4 ports is upstream, so connects to the pc; one other three are downstream for connecting other equipment. The device has 3 USB 3.0 Style-A https://bookmarklinking.com/story135744/ethernet-simple-3-0-usb-c-hubs-no-further-a-mystery