I purchased the base model to use for a Blue Tooth to Auxiliary connection on my car radio. I noticed that the noise generated by the Nulaxy was annoying. It is a constant hum and static when music is not played. When music is played,, unless very loud, I can still hear it. I know that the source of the noise is the Nulaxy itself, and not my phone because I hooked my phone ear jack directly to the aux input on the radio and it was silent. I thought that the new upgraded version of the Nulaxy would have reduced or eliminated the noise, but it is still just as bad. The designers of the device need to pay attention to this because if they can solve this noise problem, the device will be perfect.