Headset Interface: 3.5mm 4pin(1 Plug)+USB. Speaker Material: 50 for cm steel speaker. Microphone: 6.0x2.7mm. Microphone Sensitivity: -38 ± 3db. Microphone Impedance: 2.2KΩ. Features: Soft, all-inclusive, skin-friendly protein leather earmuffs can effectively block ambient noise.
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