/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/10p, 12M
    |__ Port 2: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
    |__ Port 8: Dev 4, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 8: Dev 4, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 8: Dev 4, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 8: Dev 4, If 3, Class=Human Interface Device, Driver=usbhid, 12M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/10p, 480M