cat /var/log/dmesg | grep Blue*
[    1.582145] usb 1-1.4: >Product: Bluetooth USB Host Controller
[   20.397499] Bluetooth: Core ver 2.16
[   20.397608] Bluetooth: HCI device and connection manager initialized
[   20.397919] Bluetooth: HCI socket layer initialized
[   20.397923] Bluetooth: L2CAP socket layer initialized
[   20.397931] Bluetooth: SCO socket layer initialized
[   20.425174] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   20.425179] Bluetooth: BNEP filters: protocol multicast
[   20.432847] Bluetooth: RFCOMM TTY layer initialized
[   20.432856] Bluetooth: RFCOMM socket layer initialized
[   20.432859] Bluetooth: RFCOMM ver 1.11