The Hamilton Buhl MS2LV Personal Headphone with Leatherette Ear Cushions and In-Line Volume Control or the MS2L Personal Headphone with Leatherette Ear Cushions is the perfect companion to today's classroom technology including the Apple iPad, iPod Touch, Android devices, MP3 players and many other players. These devices are everywhere in today's schools and each student needs a robust headphone with high quality sound to get the most out of their high tech lessons. The lightweight, on-ear design allows for all-day comfort and easy compact storage. Personal, On-Ear Design Leatherette Ear Cushions, Replaceable MS2LV In-Line Volume Control Automatic Stereo/Mono Plug: 1/8" Stereo/Mono Jacketed Adapter: 1/4" Stereo/Mono Screw-On Cord: 5 feet Speaker drivers: 30mm Frequency response: 25-16,000 Hz Impedance: 32 Ohms Sensitivity: 105dB Heavy-duty, write-on, reclosable bag (helps prevent the spread of lice) Weight: 5 Ounces Warranty: 1 Year