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Specifications: 1) Driver unit: 57mm 2) Impedance: 64Ω 3) Sensitivity: 107±3dB at 1kHz 4) Frequency response: 5Hz - 30kHz 5) Cord: 2.5m 6) Maximum power: 3,500mW 7) Magnet: NbFeB 8) Plug: 3.5mm stereo plug 9) With: 6.3mm gold plated adaptor 10) Cord length: 4m±50mm