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 and comfort necessary in busy calling environments. The over-the-head design can be worn in a monaural (single earpiece) style and features generously padded ear cushions for optimal comfort during phone-intensive tasks.
Specifications
General 
Product Type: Headset
Recommended Use: PC multimedia
Additional Features: Noise canceling circuit, mute button, answer/end button, echo cancellation, volume control, built-in DSP, SoundGuard technology
Headphones Headphones Form Factor: On-ear
Connectivity Technology: Wired
Sound Output Mode: Mono
In-Cord Volume Control: Yes
Microphone Type: Boom
Connections Connector Type: USB ( 4 pin USB Type A )
Miscellaneous Cables Included: Headset cable - integrated
Compliant Standards: Plug and Play
Manufacturer Warranty Service & Support: 2 years warranty
Service & Support Details: Limited warranty - 2 years
Product Reviews
well made usb powered mono headset. good clean sound, noise cancelling works well.