Instruct: Classify Amazon reviews into positive or negative sentiment
Query: D-Link DBT-120 Bluetooth Adapter a disappointment

This adapter was difficult to install. I had to get D-Link's assistance. Once installed, it kept uninstalling. I bought it to link my cell phone to my computer. During the attempt to pair the cell phone to the computer, I was asked to provide a passcode, which I couldn't find, so the whole thing was an exercise in frustration. I ended up buying a USB cable to link the phone to the computer.