PLANTRONICS BLACKWIRE C3220 HEADSETBlackwire 3200 seriesthe blackwire 3200 series corded UC headset are durable, lightweight, easy to deploy and come in a variety of connectivity and wearing options. Add insights from Plantronics Manager Pro, an additional service, and you've got a future proof solution. The blackwire 3200 series with Plantronics signature audio provides top notch features at a price you can afford.*Stereo - Black - USB type A - wired - 20 Hz - 20 khz - over-the-head - binaural - supra-aural - noise Cancelling microphone*Available in monaural (C3210/C3215) or Hi-Fi stereo with passive noise reduction (C3220/C3225)*Variants include universal USB or usb-c*Connectivity technology: wired*Minimum frequency response: 20 Hz