Brand: Koss. MPN: KE5K. Ultra-lightweight the KE5 is the perfect accessory for portable use. A 4 ft. straight cord and L plug provide flexibility and reliability for active use. The KE5 is the perfect travel companion designed to fit into anyone s price range or travel plans. Built to last the KE5 is covered under Koss Limited Lifetime Warranty - the only warranty of its kind in the stereophone industry.