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. Specifications: Frequency range: 18 - 20,000 Hz, impedance: 16 Ohm, Sensitivity: 110 dB SPL. Cable: Straight, Dual Entry, 4ft w/ 3.5 mm plug. Finish: Grey