The iD7S is a sleek speaker system that"s ready to rock your iPhone, iPad or iPod anytime! The iD7S includes SRS TruBass circuitry and 4 speakers in Reson8 chambers for an exceptional audio experience. The retracting universal dock charges and plays iPad, iPhone and docking iPod models. Operates on 4 AA batteries or AC adaptor, so you can enjoy music anywhere.