The Free port splitter plugs into an ear phone or head phone audio output jack. A fantastic multi-purpose phone stand. Holds phone by sticking onto the back via suction cup. Remove the suction cup then use it as a universal 1/8" earphone splitter. Allows 2 earphone jacks to plug in and two people to listen to the same audio with their own set of head phones. Great for use with iPhone, Android, iPad, iPod Touch, and other MP3/MP4 devices.