To list bluetooth devices on Ubuntu, run
hcitool dev
To list usb devices, run
boby@sok-01:~$ lsusb Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 004: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n Bus 003 Device 003: ID 2516:0057 Bus 003 Device 002: ID 046d:c077 Logitech, Inc. M105 Optical Mouse Bus 003 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 003: ID 1395:0025 Sennheiser Communications Bus 001 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub boby@sok-01:~$
“Cambridge Silicon Radio” is the USB device i have on my PC.