The JBL On Tour is a compact, lightweight, high-performance portable sound system. Connected to your iPod, MP3 player, laptop or other music source, the JBL On Tour will provide hours of clean, powerful sound. JBL On Tour runs on 4 AAA batteries or with an AC adapter. With a protective cover and compact size, you can easily go on the road and let your iPod or MP3 player rock out in your room.