(Milwaukee, Wisconsin) May 1, 2018 – Koss® Corporation (NASDAQ Symbol: KOSS), the U.S. based high-fidelity Stereophone manufacturer and inventor of the world’s first SP3 Stereophone in 1958, announced the release of the Porta Pro® Wireless Bluetooth® headphones. “In 1984 we created the Porta Pro® to be the ultimate portable pair of headphones to last a lifetime,” said Michael J. Koss, Chairman & CEO. “Thirty-four years later, The Porta Pro® remains one of the world’s most popular on-ear portable headphones.” The new Koss® Porta Pro® Wireless combines the legendary sound and the iconic design of the classic Koss Porta Pro® headphones and adds wireless Bluetooth® 4.1 with apt-X functionality. “Our Design and Engineering Teams collaborated to make one of the world’s most iconic headphones wireless – while maintaining The Sound of Koss® acoustical signature that Porta Pro® fans have cherished for more than thirty-four years,” said Michael J. Koss, Chairman & CEO. The Porta Pro® Wireless Bluetooth® headphones feature a rechargeable lithium-ion battery that can last 12+ hours. In-Line controls on the Porta Pro® Wireless Bluetooth® headphones allow users to wirelessly change songs, answer/end calls, adjust volume, and much more*. A microphone is integrated with the in-line controls giving users the ability to talk wirelessly on the phone, record audio, and control their source device*. The Porta Pro® Wireless Bluetooth® headphones are available today for $79.99 at Koss.com, Amazon.com and Massdrop.com Koss® Corporation: The Original American Stereophone Company since 1958 Koss® markets a complete line of high-fidelity headphones, wireless Bluetooth® headphones, wireless Bluetooth® speakers, computer headsets, telecommunications headsets, active noise canceling headphones, and compact disc recordings of American Symphony Orchestras on the Koss Classics® label. For more information, follow Koss on Instagram @Koss, Twitter @KossHeadphones, on Facebook at Facebook.com/Koss, or at Koss.com. *Some features are source dependent The Bluetooth® word mark is a registered trademark owned by Bluetooth SIG, Inc. and any use of such mark by Koss® Corporation is under license.