The SC 30 USB ML Culture Monaural Headset from Sennheiser is a single-sided wideband headset optimized for Microsoft Lync, and compatible with global providers of Unified Communications solutions. It features integrated call control and a USB connector. The Sennheiser HD voice clarity has a wideband sound for a more natural listening experience. The noise-cancelling microphone is designed to filter out ambient noise. The single-sided wearing style allows you to hear what's going on around you. The SC30's pivotable boom rotates through 340° for wearing flexibility on right or left ear. The boom arm is bendable, which allows you to adjust the microphone position. The ActiveGard technology is designed to protect you from acoustic shock and sudden sound surges. The call controls allow you answer or end a call, increase and decrease volume, mute the microphone, and redial the last outgoing call. The SC30 USB headset includes a large acoustic foam ear pad for increased comfort.