Poly Blackwire C320-M Desktop PC Headset Wired With Mic USB 85619-01\n\nBasic Specifications\nManufacturer's Part Number: 85619-01\nEAN: 0017229137271\nProduct Type: Headset - wired\nMicrophone: Boom\nSound Output Mode: Stereo\nHeadphones Type: Headset - stereo\nConnectivity Technology: Wired\nHeadphones Form Factor: On-ear\nAudio Specifications: Frequency Response 20 - 20000 Hz\nControls: Mute, volume, answer/end\nProduct Description: Poly Blackwire C320-M - headset\nRecommended Use: Computer\nModel: Poly Blackwire C320-M\nEnvironmental Standards: TCO Certified Headsets 3\nConnector Type: USB (4 PIN USB Type A) \n\nPoly Blackwire 5220 Headset Wired With Mic C5220 USB-A 207576-201\n\nPoly Blackwire 5220 Headset Wired With Mic C5220 USB-A 207576-201\n\nClick images to enlarge\n\nDescription\n\nPoly Blackwire 5220 Headset Wired With Mic C5220 USB-A 207576-201\n\nBasic Specifications\n\n--Manufacturer's Part Number: 207576-201\n\n--EAN: 017229173354\n\n--Microphone Active Noise Cancellir