Blackwire C435-M for Microsoft Convertible mono/stereo headset is Microsoft Lync compatible, discreet and webcam friendly Answer/End/Mute controls to simplify PC call management with an In-line indicator light to display call and mute status Noise-cancelling microphone to filter out background noise Rugged, collapsible design easily stows in the durable travel case for use on-the-go Dynamic EQ stereo automatically adjusts for voice and multimedia use