Many newer laptops do not come with an ethernet port leaving users only wifi to get connected to the internet the ua3000e usb 30 ethernet adapter 3 port hub provides a wired connectivity option with lightning fast transfer speeds where wireless access isnt available or if you have a broken internal network card the usb 30 ethernet adapter simply plugs into an available port on your laptop and supports 101001000 base t performance also included are three usb 30 ports for additional dev