KOSS ED1TCi On-Ear Headphones with Inline Mic (Classroom 10-Pack)Ideal for schools, libraries, hospitals, medical facilities and training departments, the ED1TCi communication headphones incorporates a plastic ear cup that allows easy cleaning with maximum durability for a multiple user environment. Perfect for education, schools, learning labs and libraries. The in line microphone allows for easy communication and works well in an education or commercial setting. An adjustable headband allows for custom comfort