Bus 004 Device 002: ID 045e:00f9 Microsoft Corp. Wireless Desktop Receiver 3.1
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 041e:201f Creative Technology, Ltd 
Bus 001 Device 003: ID 058f:6362 Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer (Internal/External)
Bus 001 Device 002: ID 04a9:10c9 Canon, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub