Bus 001 Device 004: ID 0bda:0151 Realtek Semiconductor Corp. Mass Storage Device (Multicard Reader) Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 003: ID 0461:4d81 Primax Electronics, Ltd Dell N889 Optical Mouse Bus 002 Device 002: ID 04d9:1702 Holtek Semiconductor, Inc. Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub