Brand: Koss. MPN: PLUG W. Koss Plug Classic Noise-Isolating In-Ear Wired Earbuds - White Enjoy accurate acoustical reproduction and unbelievable isolation typically found in more expensive, closed-style headphones. These earbuds feature a dynamic element positioned just outside the ear and connected to a tubular port structure that's inserted on a soft, expandable cushion into your ear. This ear cushion is made of hydrophilic, formed urethane for a custom fit every time. This fit helps improve sound isolation by blocking out ambient sounds that can interfere with your listening experience, and enhancing deep bass and treble clarity. What You Get Plug classic noise-isolating earbuds Manufacturer's limited lifetime warranty.