SMAYS Nylon Braided 4-Pole 3.5mm Male to Male Stereo AUX Extension Cable for Audio/Car, 5ft, Blue This male to male stereo TRRS cable is used to listen to your iPod, iPhone or other phone music through your car stereo. Just plug one end of the cable into your iPod or iPhone and plug the other end into your car's auxiliary input jack. It's very simple. The cable can also be used for any speaker system with a standard 3.5 mm input jack. This auxiliary audio cable is part of the high performance series of cables If your vehicle's stereo has an aux-in port, then use the 3.5mm stereo audio aux cord to listen to MP3 or internet radio from your cell phone, PDA, or MP3 player in your car; Connect your phone with 3.5mm input jack to any 3.5mm interface or receiver and output your favorite music and podcasts Buy the Apple iPhone 4 3.5 mm stereo audio aux cable if you need a male to male 3.5mm connection for audio output Listen to music on any stereo that features a 3.5mm aux input port; Great way to hook up your phone/iPod to your cars stereo Support microphone (audio input), speaker (audio output) and recording