Without changing the sound or the design to the original we added an all-new cable system to the iconic Porta Pro that features an in-line microphone and 1-touch remoteThe acclaimed Koss Porta Pro has set performance and comfort standards for personal listening worldwide Designed for those with refined musical taste the Porta Pro continues to be one of the most popular headphones around the worldKnown for its high-level of comfort the Porta Pro has adjustable temporal pads to relieve pressure on the ears Its lightweight open-air cushions for hear-through sound keep listeners aware of their surroundings while delivering exceptional soundThe oxygen free copper voice coils and dynamic elements allow the Porta Pro to deliver rich bass and a remarkably wide frequency responseWhether you listening at home or on the go the Koss Porta Pro with microphone delivers all the excitement of a live performanceThis is all backed up by the Koss Stereophones Limited Lifetime Warranty