Premium Audio Headphone Jack Mini Splitter. Share the sonic goodness! This indispensable adapter plugs into your iPod or MP3 player's headphone jack, and provides two stereo minijacks so you and a friend can each connect a pair of headphones and listen together. It's especially handy when you're on a plane or riding in a car: whether you've packed your iPod with hours of audiobooks, music, or both, now two of you can listen! compatible with iPods and other portables equipped with a 3.5mm minijack output