Blackwire C610-M MOC. - Plantronics Blackwire C610M headset for Microsoft Office Communicator- Professional grade wideband audio optimized for PC communication environments where frequent softphone conference calls take place- Noise-canceling microphone limits outside noise interruptions, ensuring excellent audio quality and easing listener fatigue- Echo cancellation for full-duplex speakerphones when both the microphone and speaker are on at the same time- Hi-Fi stereo sound ensures audio quality for calls and multimedia applications like music, video conferencing, etc. (C620)- Call controls include call/answer/end button for easy call management- Volume adjustment with +/- and mute button simplifies operation- Soft ear cushions, and flexible headband adjusts for the perfect fit and all day comfort- QuickAdjust boom offers an adjustable boom angle, and microphone-to-mouth distance for optimal voice transmission- SoundGuard protects hearing from loud sound spikes by limiting call volume at 118db- Choose total-focus sound reduction (C620 binaural design) or converse easily with co-workers while wearing the headset (C610 monaural design)- Ideal for frequent users of PC audio, conference calls, webinars, video conferencing and collaboration- Optimized for Microsoft Office Communicator 2007- Standard version supports leading softphone vendors, Avaya, Cisco, IBM and more- Backed by Plantronics global service and supportPL8127241