Plantronics Blackwire C620 Headset For those who spend hours each day on long conference calls, webinars and video conferencing, the exceptional voice clarity and all-day comfort of the Blackwire 600 Series make communications more effective and productive. Featuring a flexible boom, a noise-canceling microphone and digital wideband telephony, the Blackwire 600 Series delivers the performance … Continue reading Plantronics Blackwire C620 Headset