This Kit Contains: HamiltonBuhl® SchoolMate™ Deluxe-Sized Headphones with Volume Control; HamiltonBuhl Heavy-Duty Polyester Carry/Storage Case – Unmatched Durability and Stability; SchoolMate Deluxe Stereo Headphone with 3.5mm Plug and Volume Control; Heavy-Duty Polyester Carry Case with Collapsible Inner Frame Panel This lab pack of 12 HamiltonBuhl SchoolMate SC-7V deluxe-sized headphones with volume control and leatherette ear cushions comes in a heavy-duty polyester carry case with collapsible inner frame panel. Design: Deluxe, over-ear Cushions: Leatherette, replaceable Headband: Adjustable Plug: 3.5mm TRS stereo, 120° angle, thin barrel Cord: 5' Dura-Cord - chew-resistant, PVC-jacketed, braided nylon Speaker drivers: 40mm Frequency Response: 50Hz-20KHz Impedance: 32Ω Sensitivity: 100dB ±4dB Volume Control: On ear cup Storage Bag: Anti-Lice, heavy-duty, write-on, moisture-resistant, reclosable bag. Helps prevent the spread of lice! When sealed in the bag, lice are killed in 24-48 hours without the use of chemicals Prop 65 Compliant