Koss Corporation, the Milwaukee, Wisconsin based high fidelity stereophone manufacturer and inventor of the world's first SP/3 Stereophone in 1958, has revolutionized the world renowned Porta Pro.

Porta Pro KTC, the most sophisticated version of the Porta Pro, features a new technological upgrade which brings listeners closer to the music they love. Koss Touch Control (KTC) remote and microphone technology, made for iPhone, iPad and iPod, gives listeners more control in fewer steps. Now listeners are able to stay connected, shuffle songs and adjust volume with the flick of a switch.