Dimensions (when opened) 6.49 (W) x 8.1 (H) x 1.61 (D) inch- 165 (W) x 208 (H) x 41 (D) mm- Weight 11.28 oz. / 320g,- Cord Length 3.9ft coiled/ 10ft uncoiled- 1.2m coiled / 3m uncoiled- AUDIO SECTION- Load Impedance 36½ ohms- Driver Size ø53mm- Transducer Type Dynamic- Frequency Response 5Å'33,000Hz- Channels L/R Stereo- Sensitivity (1 mW) 105dB/mW(JEITA)- Maximum Input 3500mW