Type: Dynamic Plug: 3.5mm Stereo Mini Plug (plug type: L plug) Input Impedance: 16 omega Cord Length: 110cm (Y shape) Driver: Dia. 5.5cm Played Frequency Band: 20-22.000Hz Sound Pressure Sensitivity: 91dB/mW Inner/Exterior Measurement: 10x4 [Set Contents] -Stereo headphone -Ear piece (XS, S, M, L)