Rugged Polypropylene Carry/Storage case: Holds entire listening center contents Impact resistant Eight 2924AVP Monaural headphones: Fully adjustable noise-reducing earcups made with rugged ABS plastic for added durability; Permanently attached cord with reinforced connection 8-position 1218AVPY Monaural jackbox: Silver-plated contacts eliminate crackling sound when connecting headphones Individual volume control for each listening station Comes with 1/4" and mini plugs for versatility