The new Koss Porta Pro® Wireless takes the legendary sound and the iconic design of the classic Koss Porta Pro® headphones, wireless using Bluetooth 4.1 with apt-X. 
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, change 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. 
Like the Porta Pro® Classic headphones, the Porta Pro® Wireless Bluetooth headphones have 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 sound performance. Oxygen free copper voice coils and dynamic elements allow the Porta Pro® Wireless Bluetooth headphones to deliver rich bass and a remarkably wide frequency response. A Porta Pro® Headphones case is included.

Bluetooth 4.1 with aptX 
Integrated microphone & In-line controls 
Built-in rechargeable lithium-ion battery with 12+ hours of playtime 
Comfort Zone setting on temporal pad 
Collapsible design for compact storage 
Includes headphones case for protection

Specifications