Interesting use for the USB port on the VVX 411 phone. I have a Plantronics Voyager Legend UC bluetooth headset that you would typically use with a PC (and you can use with the RC desktop app). Apparently you can plug in the bluetooth USB dongle that comes with the headset into the USB port on the back of the VVX 411 and the phone will recognize the headset. Very effective and economic way to use a wireless headset with this phone. Note you will need to plug the dock into a computer or use a USB power adapter to charge the headset.