Features Frequency Response: 10-20 000 Hz Dynamic element for extended frequency response Unique earbud design directs sound into the ear canal for deep bass and extended frequency performance Speciality ear cushion material forms slowly in the ear canal to provide a custom fit and maximum isolation Includes replacement ear cushions Reliable L plug for improved reliability and durability Specifications Frequency Response: 10-20 000 Hz Impedance: 16 ohms Weight: 0.25 oz w/o cord Sensitivity: 112 dB SPL/1mW Distortion: <0.3% Ear Cushions: Cord: Straight Dual Entry 4ft Plug: 3.5 mm Warranty Lifetime warranty