Sony MDR7505 Professional Sealed Ear Stereo Headphone (Discontinued by Manufacturer) Professional headphones feature a swivel mechanism for various wearing positions Acoustically sealed earcups allow for easier listening in loud environments Excellent power-handling, 40-millimeter driver for high quality sound Neodymium magnet delivers powerful bass and clear highs Gold-plated, unimatch connector for universal compatibility with desktop and portable devices Connectivity technology : Wired