Koss RUK40 on-ear headphones are lightweight headphones that pack the robust Sound of Koss. Utilizing dynamic elements that deliver a smooth bass with a wide frequency response, the RUK40 is anything but your standard on-ear headphone. Available in a variety of color combinations, the RUK40 shows off your own style while you enjoy music the way it was meant to be heard.
  • Active, Lightweight On Ear Stereophones
  • Dynamic Elements Deliver Deep Bass and A Wide Frequency Response
  • Pivoting Ear Plates and Cushioned Pads Designed For Maximum Comfort
  • Straight, Dual Entry, 4 Ft Flat Cord With 3.5mm Plug

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