Gold Plated 1/8"" (3.5 Mm) Stereo Plug With 1/4"" Adaptor * Wide Frequency Range Delivers Full Bass And Detailed Highs * Optimized Performance For Use With Most Pro And Consumer Audio Devices - Frequency Range: 20~22,000Hz - Length of Cable: 9 ft. * Closed-Back, Circumaural Design Rests Comfortably Over The Ears And Reduces Background Noise - Impedance: 32 Ohms ± 15% - Max. Input Power: 100mW * Single-Sided Cord With Oxygen-Free Copper Wires - Driver Size: 50mm - Sensitivity (S.P.L): 115dB±3dB/mW (at 1 KHz)