Brand: Koss. MPN: R80. The R80 stereo headphones from Koss provide high-quality sound in a lightweight and comfortable form factor. The dynamic elements and NdFeB magnet structures provide accurate sound reproduction with a wide frequency response. The adjustable headband and around-ear leatherette cushions provide long-lasting comfort while the detachable 8 single-sided coiled cable provides plenty of slack. The 3.5mm mini plug provides compatibility with a wide variety of audio devices.