This device has great sound quality. I use it primarily for my workouts; it can also connect to my BT cell phone, however, I tried to switch from my ipod to my cell phone and got a conflict and it took quite a while to reset everything. I bought the BT adapter with my S9. I advise a prospective buyer NOT to buy the Motorola BT 30 pin connecter. Whenever the ipod is jiggled or moved, the ipod goes to pause and the adapter has to find your phone again; really annoying during workouts. I do advise buying the smaller Sony BT 30 pin adapter because it fits beeter when using a case and is more stable. You may also consider buying an BT that connects to the headphone plug as well.Good unit, except for the Motorola adapter!