Elegantly designed for boardroom, meeting room or auditorium. Two 6 x 8 tapered oval full-range Jensen design speakers for high audio quality. Two large storage shelves provide a place for laptop, binders and notes. Four casters let you easily move it wherever you need it while two locking casters secure it in place. Runs on ten D batteries or AC adapter or converts to a rechargeable system with AC adapter and NiCad battery pack.