I bought the RX3115 so that I could stream music to the device from my desktop. However, the mobile media software would never connect to my desktop. After spending 1 1/2 hours on hold, I was told that the help desk could not get it to work either and that they would send the problem up the ladder. I got a call back today, and was told that the support staff in Houston could also not get it to work, and they had no answers on how to fix it. As such, I am returning it. Do not buy this if you are interested in this feature! It is a shame because otherwise it is a really nice device...