Koss QZ-99 Noise Reduction Stereophone Passive Noise Reduction Headphones.Connectivity Technology: Wired Neodymium Magnet Structures Deliver Outstanding Clarity & Definition Closed Pneumalite(Tm) Ear Cushions & Extra Secure Headband Seal Ears, Eliminate All Ambient Noise Volume Control On Ear Cup Allows Easy Level Adjustment Stereo/Mono Switch Extends User Flexibility Passive noise reduction stereophone system isolates listener from ambient sounds Volume control on earcup for easy level adjustment Ideal for use with racing scanners and metal detectors Stereo/mono switch for added flexibility Single-entry, 8-foot coiled cord