I purchased this product 6 months ago to amplify my satellite radio volume when plugged into my auxiliary input on my motorcycle stereo system. Without the Boostaroo it was difficult to hear at speed even with the stereo volume maxed out and with the boostaroo the auxilliary input of the satellite radio is close to the same volume level as the radio or cd player. I have not had any probelms with the unit in the 6 months I have owned it and it solved my problem.