Format: sealed dynamic stereo headphonenUse unit: diameter 50mm/Impedance: 18ΩnSound pressure sensitivity: 92dB / mW/Maximum input: 1,500mWnPlayback frequency band: 4 ~ 50,000HznCord length: about 1.2m / about 3.0m (detachable cord)nProduct Description 1. Newly developed, comfortable, depending on the shape of super multi-layer film (MLF) diaphragm adopt φ50mm large caliber HD driver installed broadband, high-resolution playback the realization 2.HS from deep bass to 50kHz (Horizontal Slide) adjustment mechanism equipped with head excellent Na fit to the realization 3. ergonomic 3D ear pads adopted tightness, sound insulation, and realized a fine comfortable to wear