Detailed Product Description Computer Headphone with Microphone description:1, Headband design,rugged stainless ... noise cancellation rotation microphone,provided the best sound clarityDetail description:1, Headphone,Earphone,Headset,computer headphone,Computer headset,Earplug.2 ... ±3 dBDirectionality:Omni-directionalMi-head impedence:≤2.2KΩSpeaker Diameter:40.0mmSpeaker impedence:32ΩFrequency Range:20- ...