Poly Blackwire 3320 USB-A HeadsetStyle, comfort and audio qualityBuilt for style with a sleek design that focuses on comfort and reliability. Poly signature audio quality so you know you will sound great. And intuitive and simple features so every user can connect to their preferred device simply and easily. Performance Cable length 2.18 m Operating keys Answer/end call, Volume +, Volume - Product colour Black Headset type Binaural Recommended usage Office/Call center Wearing style Head-band Product type Headset Ports & interfaces USB connector USB Type-A USB connectivity Yes Connectivity technology Wired Headphones Headphone sensitivity 116 dB Impedance 32 Ω Ear coupling Supraaural Microphone Microphone direction type Omnidirectional Microphone sensitivity -38 dB Microphone frequency 100 - 10000 Hz Microphone type Boom System requirements Mac operating systems supported MacOS Windows operating systems supported Windows 10 Weight & dimensions Weight 130 g