Fi-Hi Urban DJ "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 "U B DJ" anywhere, anytime. Fi-Hi Urban DJ easily connects to any device with the included 3.5mm stereo jack patch cables (iPhone compatible). Fi-Hi Urban DJ has a headphone monitor that lets you cue up your next song with out missing a beat. Connect to your Fi-Hi Stereo Speaker Bag or any amplified speaker system and become a mix-master. Fi-Hi Urban DJ requires two "AAA" batteries that will provide over 8-hours of non-stop block-rockin' tunes.