The Plantronics Blackwire C420-M. The corded Blackwire C420-M headset lets you enjoy crystal clear PC/Computer audio anywhere your work happens. Optimized for use with the Microsoft Office Communicator software &  designed for all day comfort, this durable headset provides users with the freedom to experience PC/Computer audio, through a high quality headset whenever they need it.

Main Features:

• Professional grade wideband audio optimized for PC communication environments where frequent softphone conference calls take place

• Durable, portable design

• Folds flat and tucks into laptop bag

• Rugged design optimized for portability

• Protective travel case

• Superior sound quality

• Digital Signal Processing (DSP) provides more natural voice sound

• SoundGuard® technology provides protection against audio spikes

• Full range High Fidelity stereo sound

• Wideband for best PC audio telephony

• Noise-canceling microphone filters out background noise

• QuickAdjust™ boom for ideal microphone placement

• Innovative, user-friendly design

• Designed for extended wear

• Adjustable headband for customized fit

• Call controls at your fingertips; call answer/end, volume +/-, mute

• Soft, adjustable headband

• Simple plug-and-play USB connectivity

• One year limited warranty