I use a HP IPAQ (with GPS) on my motorcycle. It also has stereo capability. I wanted to be able to listen to music without the wired headphones. I use bluetooth headsets for my home stereo, so I searched for a bluetooth adapter for use on my IPAQ. I found the Sony at a good price. It works very well. A charge will last about 10 hours, and allows me to ride and listen to music. I recommend this item for anyone wanting to use a bluetooth adapter.