Amazon.com The Koss Pro-4AA stereo headphones were built with studio and broadcast use in mind. Closed-ear cushions provide excellent isolation and bass, while high and low sounds come in clear due to its 10 to 25,000 Hz frequency response. The Pro-4AA includes microphone mount hardware, 0.25-inch plug, and a coiled, single-entry 10-foot cord. From the Manufacturer A Home headphone is a headphone that is primarily used in the home, with home electronics. Generally speaking, home headphones are somewhat larger and more isolating. Home headphones with cords tend to have a longer cord.Features Frequency Response: 10-25,000 Hz Closed ear cushions for maximum bass and isolation Built for maximum durability for studio and broadcast use Includes microphone mount hardware Coiled, single entry 10 foot cord 1/4" plug