Fi-Hi Urban DJ (aka UBDJ) is a portable mixing device that uses a cross-fader to DJ between any combination of iPod, iPhone, MP3/CD player, mobile phone or multi-media device. Fi-Hi Urban DJ is easy to use and lets you be the DJ anywhere, anytime. It easily connects to any device with the included 3.5mm stereo jack patch cables (iPhone compatible) and has a headphone monitor that lets you cue up your next song without missing a beat. Connect to any amplified speaker system and become a mix-master. Urban DJ requires two AAA batteries that will provide over 8-hours of non-stop block-rockin' tunes.