I loved the original iTrip that plugged into the headphone jack. I have one on my iPod 4G. I have two of the newer iTrips that work with the Dock connector. I would not buy them again. They interfere with cases and covers. The line out through the Dock connector is too weak. It's not loud enough. I will be purchasing a new iTrip universal that works through the head phone jack soon. If you do buy the Dock connector version, it works better in international mode and with sound check on the iPod turned off.