The Technical Pro HPS820 Professional Headphones (Silver) are used to pump out one of the highest quality sound outputs and are built with an enhanced noise reducing design. These phones are also built with a Dynamic Super Bass driver. This driver is meant to properly reproduce that big full sound right inside your ear. You will be able to hear those low, thumping frequencies. Included is a portable headphone carrying case designed for safe storage. The 1/4" adapter helps to connect this headphone to other MP3 player or other component with an 1/8" input.