alan@deep-thought ~> lsusb
Bus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 007: ID 04f2:b217 Chicony Electronics Co., Ltd Lenovo Integrated Camera (0.3MP)
Bus 003 Device 005: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)
Bus 003 Device 004: ID 147e:2016 Upek Biometric Touchchip/Touchstrip Fingerprint Sensor
Bus 003 Device 028: ID 2a47:0c02  
Bus 003 Device 012: ID 0d8c:0005 C-Media Electronics, Inc. 
Bus 003 Device 010: ID 17ef:6009 Lenovo ThinkPad Keyboard with TrackPoint
Bus 003 Device 008: ID 046d:0809 Logitech, Inc. Webcam Pro 9000
Bus 003 Device 011: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth
Bus 003 Device 009: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 003 Device 006: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 003 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
alan@deep-thought ~> getfacl /dev/bus/usb/003/028
getfacl: Removing leading '/' from absolute path names
# file: dev/bus/usb/003/028
# owner: root
# group: audio
user::rw-
user:alan:rw-
group::rw-
mask::rw-
other::---