The Tranq offers high definition bluetooth 4.1 technology and a built-in microphone with volume control to offer you the convenience of wireless technology. When paired with your hands free device, you can enjoy dynamic stereo sound and even receive hands-free calls! With the Tranq noise canceling wireless headphones you can enjoy up to 10 hours of play time! Included with it’s own zippered closure travel case with a removable zippered mesh cord pocket.