The Original American Stereophone CompanyEver since we invented the world's first SP/3 stereophone back in 1958, Koss Stereophones have been bringing back the excitement of a live performance. Music lovers around the world recognize that dedication to accuracy in sound reproduction as The Sound of Koss.The Koss KEB9i is a modern blend of style and sound all in one package. An innovative angled port ensures the perfect fit at the touch of a finger. The ingenuity of the KEB9i brings you closer to the music you love. The legendary Sound of Koss takes care of the rest.LineKEB9iConnectivity (Connection)ConnectionCableConnection3.5 mm Jack PlugSize & WeightCable Length1.2 mElectrospecific PropertiesFrequency Range (Headphone)18 Hz - 20 kHzImpedance (Headphone)16 ΩField of ApplicationFor Mobile Phone BrandUniversalRecommended UseMobile PhonePhysical PropertiesCall Answer ButtonYesDesignIn-EarMaterialPlastic MaterialMicrophone PositionCable MicrophoneModelStereoSensitivity (Headphone)110 dB/SPLVolume ControlNo