pietro@Pietro-buntu:~$ lsusb && lsusb -t
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 005: ID 045e:0737 Microsoft Corp. Compact Optical Mouse 500
Bus 003 Device 004: ID 03f0:171d Hewlett-Packard Bluetooth 2.0 Interface [Broadcom BCM2045]
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 07b3:0475 Plustek, Inc. 
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
    |__ Port 1: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 1: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M
    |__ Port 1: Dev 4, If 2, Class=Vendor Specific Class, Driver=, 12M
    |__ Port 1: Dev 4, If 3, Class=Application Specific Interface, Driver=, 12M
    |__ Port 2: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
    |__ Port 2: Dev 2, If 0, Class=Vendor Specific Class, Driver=, 12M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M

pietro@Pietro-buntu:~$ sudo simple-scan