Fun earbuds to keep in touch with your music

Looking for an inexpensive pair of earbuds to take everywhere? The Koss RUK20 in-ear headphones are easy to keep in your pocket, purse or bag so you can enjoy music on your portable device anyplace and anytime. The RUK20 comes with three different-sized ear tips to help you find the right fit, so they block out noise and seal in sound for optimum bass response and clarity. Available in a variety of colors, choose your style and keep in touch with your music wherever you go.

Product Highlights:

  • includes three pairs of silicon ear tips for optimum comfort and noise isolation
  • 4-foot miniplug cable
  • frequency response: 16-20,000 Hz
  • sensitivity: 110 dB
  • impedance: 16 ohms
  • warranty: lifetime
  • Our 60-day money-back guarantee
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Hands-on research

What's in the box?

Download owner's manual

  • White earbud headphones with attached 4' cord (3.5mm plug)
  • 2 Medium white silicone tips (installed)
  • 2 Large white silicone tips
  • 2 Small white silicone tips
  • Limited Lifetime Warranty sheet

Features and Specs

Fit Style In-ear/Earbud
Earcup Type Closed
Noise-canceling No
Bluetooth No
Frequency Response 16-20k Hz
Sensitivity 110 dB
Impedance 16 Ohms
Weight Not Given
Cord Length 48"
Airline Adapter Included No
iPod Control No
Volume Control No
Built-in Microphone No
Parts Warranty Lifetime
Labor Warranty Lifetime

Product Research


Overview: The Koss Rukus-series RUK20 features unique color combinations for expressing your own personal style. These noise-isolating in-ear headphones block exterior noise so you can hear your music clearly, without outside interruption.

Silicone Tips: The RUK20s come with three sizes of silicone ear tips (small, medium, and large) for a comfortable fit.

Cord: The headphones have a 4' straight cord with a slender 3.5mm straight plug. The small diameter plug design can be easily plugged into recessed headphone jacks or when the smartphone or digital music player is contained in a hard case.

Warranty: The RUK20s are covered by the Koss Stereophones Limited Lifetime Warranty.


  • Frequency Response: 16Hz-20kHz
  • Sensitivity (dB/1mW): 110dB
  • Nominal Impedance: 16 ohms

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