DESC: Award Winning Sound Quality Maximum Speech Clarity Soft Clips Distortion Restricts Electromagnetic Interference Increased Perceived Loudness without Increasing Volume In-Line Volume Control for Easy Adjustment to Safe Listening Levels Lightweight and Comfortable fit Ideal for Working Out, Running or For Interactive Computer Games Straight, dual entry 4-foot cord with 1/8" and 1/4" stereo adapters Adjustable headband for comfortable secure fit For use in Computer & Language Labs, Stereos, Personal Computers, CD, DVD and MP3 Players For Use With or Without a Hearing Aid.