Koss UR10 On-Ear Headphones | Durable | All Ages | 3.5mm Plug Offers Maximum Sound Quality &amp; Comfort In A Lightweight, Portable Design Closed Leatherette Ear Cushions Provide Maximum Isolation &amp; Comfort Features Adjustable Headband That Provides A Secure Fit For Active Music Listening Closed-ear design for maximum isolation Dynamic components giving a high clear frequency response Adjustable headband for best fit Straight, single-entry 4 ft. cord with 3.5mm plug 60Hz-20kHz