I purchased this to use my Treo 650 (Cingular) for email and internet access for my laptop. The installation was a complete nightmare, the drivers are old and the the documentation on the website seems complete, but the connector still does not install right when following them. It all stems from windows XP installing drivers without allowing the device drivers that come with the adapter to be loaded.Once I did get it installed, it works great, no problems.I would probably get the Belken USB Bluetooth adapter. If you are using it for the same reason I am, Cingular even has install instructions on its site to set up the wireless functionality.