SONY Stereo Headphones MDR-EX300SL BLACK | Inner Ear Headphone (Japan Import) Type: Airtightness dynamic type,Sensitivity: 105dB/mW Driver unit: Aperture 13.5mm (CCAW voice coil adoption) Playback frequency zone: 5-24,000Hz Impedance: 16 ohms,Largest input: 100mW (IEC) Cord/code: 0.6m OFC litz wire (supplied with 0.9m extension cord)