Flexible, expandable listening center for classrooms, learning centers and training facilities. Includes 8-position jack box with volume control, eight monaural headphones and 2001 polyethylene carry case. Polyethylene case is scratch resistant and shatterproof. Hook up your media player to one of our non-powered Group Listening Centers for groups of four, six and eight students. Versatile, portable, well-designed and durable.