Koss Headphones UR40 Full Size Foldable Black/Silver January 25, 2016 500 × 500 Koss Headphones UR40 Full Size Foldable Black/Silver Koss Headphones UR40 Full Size Foldable Black/Silver Koss Headphones UR40 Full Size Foldable Black/Silver Universal Audio Wired Headsets & Headphones