Ideal for schools, libraries and training departments, the ED1TCi communication headphones incorporates a plastic ear cup that allows easy cleaning with maximum durability for a multiple user environment. The in-line microphone allows for easy communication and works well in an education or commercial setting. An adjustable headband allows for custom comfort for all ages. The ultra-durable design, adjustable headband and in-line microphone create the ideal headphone for any commercial or institutional environment. Simple to use, push-to-talk, in-line microphone allows users to quickly and easily take a phone call while listening to their favorite music. Compatible with most mobile phones that provide a 3.5mm audio output jack, the addition of the in-line microphone gives these headphones an exciting new option. Koss ED1TCi Communication Headphone is one of many Bluetooth/Cell Phone Headsets available through Office Depot. Made by KOSS.