Koss' Product Development team and engineers look for the most innovative combinations of existing and new technologies to deliver the most exciting products possible.

Frequency Response: 40-20,000 Hz;Active Noise Reduction stereophone system;Reduces harmful and annoying low frequency sounds in noisy environments.

Closed leatherette ear cushion for maximum isolation;Collapsible design for portability;Ideal for in-flight use;Straight, single entry 4 foot cord.

* Reduces harmful and annoying low frequency sounds in noisy environments

* Closed leatherette ear cushion for added passive noise reduction

* Dynamic stereophone element for extended frequency response (40-20,000Hz)

* Includes 2-prong airline adapter for in-flight use

* Collapsible design for portability