Add gigabit ethernet connectivity and 3 usb 30 hub ports to a computer through a single superspeed usb 30 port the st3300u3s usb 30 gigabit network adapter turns a single superspeed usb 30 host connection port into an rj45 gigabit network port as well as three additional usb 30 hub ports unlike a usb 20 based adapter this usb 30 based nic lets you connect to your home or office network at full gigabit bandwidth with support for 101001000mbps plus with support for features such