HamiltonBuhl SOP-PRM8JB Sack-O-PhonesSack-O-Phones is a convenient way to transport multiple headphones and equipment from class to class. The carry bag doubles as a knapsack and holds 8 Blue Primo headphones with 3.5mm TRS plug and one (1) jackbox. Every headphone in SOP-PRM100LC comes in its own heavy-duty, anti-lice, write-on, moisture-resistant, resealable bag. Primo Headphones are durable and designed to withstand the K-12 environment, They feature noise-reducing earcups that help block out distracting ambient noise and helps keep students focused on their lessons.HamiltonBuhl's Dura-Cord is included on every pair of Primo Headphones. This ABS plastic, chew and kink-resistant cord is rugged and reliable, ensuring these headphones stand-up to everyday use. SOP-PRM100LC Sack-O-Phones Includes:(8) Blue Primo Headphones (PRM100)(1) Jackbox (1) Carry Bag (SOP)