EPOS Impact SC 30 USB ML Headset by Sennheiser. . Enjoy more natural-sounding conversations and great quality audio with headsets designed for enterprises introducing Unified Communications. Experience the difference unique EPOS technology can make to your efficiency and well-being.. Wired, single-sided headset with USB connectivity, designed for enterprises introducing UC.. Ensure quality sounding calls. With EPOS VoiceTM technology and noise-cancelling microphone for natural, clear conversations. Deployment friendly headset. Compatible with all major Unified Communications platforms. Easy call management. With in-line call control unit to mute, adjust volume and answer/end calls. Enjoy great comfort. Ultra-lightweight headset with comfortable acoustic foam ear pads. Protect your hearing.