Sennehiser SC 70 USB CTRL (506504) - Double-Sided Business Headset | For Unified Communications | with HD Sound, Noise-Cancelling Microphone, & USB Connector (Black) Mobile Unified Communications: For professionals who require a consistently excellent hands-free communication solution for phones and all UC platforms (Cisco, Avaya, IBM, etc.) HD Sound: Powered by a neodynium speaker for legendary Sennheiser HD sound to ensure a clearer and more natural voice & audio experience Noise-Cancelling Technology: Filters out all unwanted background noise for crystal-clear conversations on calls 2-in-1 Earpad Styles: Choose between soft leatherette or light acoustic foam for maximum comfort Bendable Boom Arm: Flexible arm ensures that your microphone stays in the perfect position and cannot be twisted out of place Contemporary Style: Eye-catching headset design looks and feels good from the front-desk to video calls Peace of Mind: With a 2-year warranty on all headsets (including batteries), you never have to worry about the quality of your USB Business headset In-Line Call Control Unit: Answer or end your calls, control the volume, mute your mic and redial calls - all directly from your headset ActiveGard Technology: Ensures protection against acoustic injury caused by sudden sound bursts on the line Premium Protection: All SC 70 business headsets come equipped with a protective carrying case for easy stoarge and transport