It receives radio signals because it displays what songs are playing on the current station, but no sound comes through the car's speakers. I tested to see if it was just my installation by plugging earphones into the front jack but there was still no sound. I then plugged in an ipod, and it displayed the first song was playing but I still got no sound from either my car or headphones.

Audio Players & Recorders - Pioneer - Deh-3400ub Car Cd/mp3/wma Player; Ipod Control, Front Aux-in