From the Manufacturer Experience exceptional sound quality, whether you're conducting a video conference call or listening to music, with the Blackwire 435-M USB Headset from Plantronics. Optimized for use with Microsoft Lync and Microsoft Office Communicator, this corded headset features wideband audio and dynamic EQ for greater voice clarity on calls. A modular, over-the-ear design allows for stereo or mono sound, while built-in controls make it easy to answer, end, or mute calls and adjust the volume.Plantronics Blackwire 435-M USB HeadsetFeatures a modular over-the-ear design and simplified call management controls. View larger.Experience exceptional sound quality during video conference calls. View larger.Superior Sound Quality with Dynamic EQThe Blackwire 435-M Headset offers wideband audio for increased speech clarity and the exceptional PC audio quality. A dynamic EQ feature optimizes the quality of your voice when you're on calls and automatically adjusts the settings when you're listening to music or you want high-quality sound for multimedia playback.The headset is also equipped with a noise-canceling microphone that filters out background noise and lessens listener fatigue. Enhanced Digital Signal Processing (DSP) makes voices sound more natural, while SoundGuard technology protects against audio spikes.Discreet Design with Stereo or Mono SoundFeaturing a modular over-the-ear design, the Blackwire 435-M can be worn with two ear buds for stereo sound or one ear bud for mono, depending on your preference. Its discreet look is great for video conferencing, PC telephony, and other multimedia applications.For greater stability, the headset can be worn behind-the-head with the addition of a neckband (sold separately).Optimized for Use with Microsoft Lync/CommunicatorThe Blackwire 435-M is certified by Microsoft for use with the 2010 version of Microsoft Lync as well as the 2007 version of Microsoft Office Communicator. Rather than switching back and forth between your desk phone and headset, you can take calls directly with the headset with the push of a button. To place a call, simply press the headset's call control button and dial the number using Microsoft Lync/Communicator. Convenient Call and Volume ControlsControls built into the Blackwire 435-M allow you to answer and end phone calls and adjust or mute the volume, simplifying call management. Inline indicator lights show your call or mute status. Software may be required to get call control with certain softphones. See Plantronics.com for more information.Product and Warranty InformationA protective carrying case comes with this headset, making it well suited for professionals on the go.The Blackwire 435-M Headset is backed by a one-year limited warranty.What's in the BoxHeadset, eartips, protective travel case, and quick start guide.Blackwire 435-M USB HeadsetAt a Glance:Modular headset provides mono or stereo sound optionsDiscreet design is hairstyle, eyeglass, and webcam friendlyOptimized for use with Microsoft Lync (2010) and Microsoft Office Communicator (2007)Answer/end/mute controls simplify PC call managementNoise-canceling microphone filters out background noiseWideband offers exceptional PC audioDynamic EQ stereo automatically adjusts for voice and multimedia use