To download your Koss Headphone Compliance and Documentation click your product(s) below:

For additional questions please contact Koss Customer Support:
Phone: 1-800-USA-KOSS (1-800-872-5677)
Email: customersupport@koss.com
Outside USA and Canada Email: customersupport-intl@koss.com

Porta Pro Wireless 2.0 
Download Porta Pro Wireless 2.0 Legal Booklet
Download EU Declaration of Conformity