The Koss Porta Pro Collapsible On-Ear Headphones produce high-quality audio whether you’re on the go or listening to music at home. With a wide frequency range, these will bring your music to life—no matter the genre. They’re budget-friendly to make a wonderful gift for a loved one or if you’re looking to treat yourself. The most impressive feature of these headphones is their portable design. They conveniently fold into a headband for protective storage. Consequently, you can store them easily..