JVC HA-V570 Supra-Aural Headphones Sensitivity: 103 dB/mW Binaural Response Bandwidth: 8 - 20000 Hz Connectivity technology : Wired Features Super Bass Sound System, for extended low-frequency response Direct Sound Delivery structure for fuller sound Volume control built right into the 3 meter(9.8ft) cord Single-side monitoring Nominal Impedence - 32 ohms