JVC HSRX900 Premium Audio Full-size Around Ear Headphone With HQ Dynamic Sound 50mm Neodymium Driver (Black) Full-size headphones with high-quality dynamic sound reproduction with 50mm Neodymium driver unit and two types of superior sound structure. Pressure dispersion mesh head pad for comfortable long listening. Features High-quality dynamic sound reproduction with 50mm Neodymium driver unit and two types of superior sound structure Ring port structure provides high-quality dynamic sound Acoustic lens structure reproduces natural sound through two pieces of specially-engineered acoustic lenses Acoustic lenses (located in front of diaphragm) tune direct and indirect sound by subtly offsetting holes in each lenses Wide head pad and soft ear pads for optimum comfort Specifications 11.48ft(3.5m) pure copper cord for minimization of transmission loss 6.3mm plug adapter included Driver Unit 50mm Frequency Response 7-26,000Hz Nominal Impedance 64ohms Sensitivity 106dB/1mW Max. Input Capability 1500mW(IEC) Weight (without cord) 12.3oz Plug Gold plated Accessory 6.3mm plug adapter