Sony MDR-XB950/H Extra Bass Headphone - Silver (International Version) Model:Sealed dynamic. Driver unit: 40mm. Sensitivity: 106dB / mW. Magnet: neodymium. Playback frequency: 3Hz-28000Hz. Impedance: 24 (1kHz). Maximum input: 1000mW. Cord Length: about 1.2m. Code Type: Litz wire (Y type). Input Plug: Gold-plated L-type stereo mini plug. Weight: about 245g (excluding cable). You can enjoy the deep bass that sense of groove.