Qzpro noise headphones according to Koss. Qzpro offers two passive active reductions and a noise reduction in the zone of choice. Its sonic comfort makes this sound a source of pleasure among travelers.
Headphones according to Koss. American company of origin. The sp 3 was already invented in 1958, the stereophones have revived live performances.
Koss as reported by Koss. A renowned invention, sp 3 koss, hifi for three generations, ingenuity, quality integrity.