Dear Mondayshot, which one did you purchase at the end? what is the difference? i really dont see any difference. THank you.

According to the model number (HSC040W), I have the Stereo. According to the descriptions on the Internet, the only difference I found was that the Stereo comes with the Jabra Link USB receiver in addition to Bluetooth. The Duo apparently only has Bluetooth. However, 2 devices can be connected to both headsets at the same time.