Unified Communications: Works seamlessly with all major UC and softphone to make conference calls simpler and more effective HD Sound: Powered by a neodymium speaker for legendary Sennheiser HD sound to ensure a clearer and more natural audio experience Easy Disconnect: Simple, quick release mechanism made to withstand the repetitive plugging and unplugging of shift changes Ultra Noise-Cancelling Technology: Filters out all unwanted background noise for crystal-clear conversations CircleFlex: Dual-hinge ear cups with acoustic foam ear pads with soft leatherette cover for long-lasting user comfort Bendable Boom Arm: Flexible arm ensures that your microphone stays in the perfect position and rotates 360 degrees to be worn comfortably on left or right In-Line Call Control Unit: Answer or end your calls, control the volume, mute your mic and redial calls - directly from your headset ActiveGard Technology: Ensures protection against acoustic injury caused by sudden sound bursts on the line Premium Protection: All SC 260 business headsets come equipped with a protective carrying case for easy storage and transport Peace of Mind: With a 2-year warranty on all headsets (including batteries), you never have to worry about the quality of your headset