Type: Over the Ear Frequency Response: 40Hz-20KHz Input Impedance: 32 ohms Sensitivity: 92dB S.P.L. at 1KHz Cord Length: 4 ft. Features: The KPH13 has side firing elements to allow smooth hear-through sound which allows listeners to stay in touch with their surroundings. Over-the-head and ultra lightweight, the KPH13 fits comfortably so that you can enjoy your music without distraction. Like other products in the Koss Everwear Series, the four new models are affordably priced for easy listening solutions.