Discontinued item the replacement is Plantronics BlackWire 300 Blackwire C210-M is excellent Product introduce by Plantronics, Optimized for Microsoft Office Communicator, With simple call controls for a convenient hands-free environment, this corded Blackwire C210-M makes voice communications over PC more effective and productive. Delivering full wideband audio and USB-enhanced digital sound, the corded Blackwire 200 series was designed for best PC voice and audio available for large enterprise-wide deployments as well as for small to medium enterprise. Most of the Users used Blackwire C210 appreciate the flexible headband that adjusts to a perfect fit and soft, swiveling ear cushions that provide all day comfort during conference calls or while listening to audio. Choose between the sound reduction binaural design or the monaural headset design offering all day comfort.. BLACKWIRE C210 KEY FEATURES: Optimized for Unified Communications, Noise-canceling microphone Reduce outside noise, Providing great audio quality and easing listener fatigue: Digital Signal Processing and wideband frequency optimizes audio for more natural voice quality Hi-Fi audio with stereo sound optimizes music and video quality Wideband microphone provides the best PC audio telephony available SoundGuard protects against instantaneous sound spikes above 118 dB SPL (sound pressure level) Ideal for occasional users of PC audio, video, webinars, conference calls, live PC presentations with desktop sharing, music, and A/V presentations Supports leading softphone vendors; Avaya, Cisco, IBM and many more