Hamilton Electronics presents a 24 pack of Hamilton HA-7 headphones for the classroom. The Hamilton HA7 Headphone features four-in-one operation on 1/8 inch stereo, 1/8 inch mono, 1/4 in stereo and 1/4 inch mono modes. New soft leatherette style washable, replaceable ear cushions, new easier-to-wear lighter design with swivel ear-cups and soft coil, 3 meter long cord (almost 10 feet!) all contribute to longer fatigue-free use. Now comes in easy to mark medium gray colors. Use in groups with a listening center jack box. At days end, pack the headphones away in the included durablepolypropylene carry case.