A built in 9 pin connector docking station for the iPod shuffle gen 2 swings flat for storage and swings up for easy access. The docking connector allows you to play your iTunes through the i–Pax. Compatible with all mp3 players using the included audio cable and side audio port on i-Pax. Up to an efficient 24 hour battery life using 4AA batteries (not included). Optional AC power adaptor included. THe i=Pax uses twin neodymium speaker drivers with aluminum cones manufactured for Sonic Impact specifically for the i-Pax to enhance your digital tunes.