HP 772K5AA Blackwire 8225 Microsoft\n\nGet exceptional audio \u2013 during and between calls\n\nIs background noise affecting productivity? Help teams keep noise out and focus with the Poly Blackwire 8225 premium headset. The noise-cancelling microphone enhanced with Acoustic Fence technology makes sure users sound clear in any environment. And the advanced hybrid Active Noise Cancelling (ANC) lets users adjust the setting to fit their environment. So, for calls and stereo music, the sound quality is premium.\n\nHeadphones\n\nDriver unit\n\n3.2 cm\n\nEar coupling\n\nSupraaural\n\nHeadphone sensitivity\n\n84 dB\n\nImpedance\n\n32 \u03A9\n\nMicrophone\n\nMicrophone direction type\n\nOmnidirectional\n\nMicrophone frequency\n\n100 - 10000 Hz\n\nMicrophone sensitivity\n\n-38 dB\n\nMicrophone type\n\nBoom\n\nPackage dimensions\n\nDepth (package,cm)\n\n5.5 cm\n\nGross Weight (Package, kg)\n\n0.33 kg\n\nHeight (package,cm)\n\n20.9 cm\n\nWidth (package,cm)\n\n18.3 cm\n\nPackaging content\n\nQ;