XCSOURCE 3.5mm AUX Input Cable Adapter ALPINE CDE 9872 9881 CDA 9852 9884 9886 9887 AC212 Provides Aux-in Source, suitable for connecting of almost any 3.5mm AUX(audio) source, to the Alpine "Full Speed" head units (2008 onwards), MP3 players, portable CD, portable DVD, video game stations, laptops, etc. Any portable player with line-out or headphones via the 3.5mm stereo could be connected. Listen to music from your 3.5mm AUX players through your Alpine Full Speed head unit or AV unit.