Sennheiser SC 30 USB ML (504546) - Single-Sided Business Headset | For Skype for Business | with HD Sound, Noise-Cancelling Microphone, & USB Connector (Black) Designed with Skype in Mind: For professionals using Skype for Business, who require a consistently excellent hands-free communication solution 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 Bendable Boom Arm: Flexible arm ensures that your microphone stays in the perfect position and cannot be twisted out of place Comfort and Durability: Large, comfortable ear pads and solid construction create the perfect light-weight headset solution USB Plug and Play: The USB Connector makes for a smoother deployment by ensuring that you can enjoy voice clarity, quality sound and comfort right from the start 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