usb headset with microphone for computer laptop noise cancelling headphone with dragon dictation mic for pc softphones microsoft teams zoom chat online teaching webex conference calls remote office mkj <p><b>this usb headset features with extremely large soft ear cushion to cover both of the ears and you will not hear background noisy. and the noise cancelling microphone filters out up to 85% background noise, customer will hear every word from your side. adjustable headband and microphone boom arm let you find the perfect fit, very comfortable for all-day use. </b></p><p><b>product specifications</b></p><p>net weight: 195g</p><p>cable type: polyurethane</p><p>cable jack: quick release with shielded wire</p><p>plug: usb2.0</p><p><b><br></b></p><p><b>electrical characteristics</b></p><p><b>1. speaker:</b></p><p>drive style: dynamic (moving-coiled)</p><p>outer diameter: φ 40mm</p><p>resistance: 32 ω+/-20%</p><p>frequency response: 50hz-10khz</p><p>sensitivity: 100±1db (at 1 khz 1mw)</p><p>max input power: 100mw</p><p>distortion: less 1%</p><p>asp (acoustic shock protection)</p><p><br></p><p><b>2. microphone:</b></p><p>directivity: uni-directional (noise-cancelling)</p><p>mic diameter:φ 9.7mmx5mm</p><p>frequency range 100hz ~ 10khz</p><p>sensitivity: -42 ±2db (0db=1v/pa, 1 khz)</p><p>impedance: 2.2k ohm, f=1khz</p><p>s/n ratio: 65db</p>