The Val-U-Pak MP3 Listening Center from Hamilton Electronics allows up to six students to engage in classroom audio learning. The portable boom box features a CD player, AM/FM radio, an iPod dock, USB port and an SD card slot. The CD player supports MP3 tracks, and the iPod dock works with all dock connector-equipped models. The listening center includes remote control, one stereo jackbox with individual volume controls, one compact carrying case and six headphones. Leatherette MS2L headphones have over six feet of cord with both 1/4-inch and 3.5 millimeter plugs.