Unfortunately I did not read the reviews before I purchased this unit...I was caught up in my new Christmas present...so I bought the car charger/transmitter. With only 4 FM setting choices to select from, I was unable to get the unit to play through my truck radio's FM stations. But, I did find out how great Amazon's return policy is and I returned the unit postage free the day after I got it. I'm still looking for a charger/transmitter. I bought a Belkin today but, the static is loud in the background and it does not charge the Ipod...only runs the Belkin transmitter. It drops the FM signal which, in turn, blows out your ears with the static that a non-transmitting station does when your radio is on it.