Sony Black Stereo Headphone Earphone Ear Clips Technical Specifications Type: Dynamic Ear Clips  Impedance: 32 ohms Driver Diameter: 30 mm  Sensitivity: 108 dB Frequency Response: 20 - 20,000 Hz  Plug: 3.5mm Plug, Gold-plated Cord Length: 1.1 m (3.7 ft.) Sony Black Stereo Ear Clips MDR-Q140B 90 Day Warranty Bulk Packaging