1.All kits car fm transmitter 2.For Blackberry & iPhone4 2.Handsfree conversations ... .To release your BlackBerry press the Cradle Lock Release buttonCompatible with: Work for Blackberry, iPhone4, iPhone 3GS,iPod nano 5th generation ... , iPhone 3G,iPhone,all iPod models,MP3 & MP4 Players,and 3.5mm stereo connector ...