This device worked for a few months, then the "auto-off" feature kept activating; it appears that the wire connecting the device to my mp3 player had a short in it. In addition, the DC plug auto adapter didn't fit well in my car and the other end fell out of the TuneCast quite easily.As for the actual audio quality and all that? I appreciated the station pre-sets. I found that the device was much more reliable powered from the car than from the batteries.