Jabra BIZ 2400 USB UC Mono Corded Headset for Softphone and Mobile Phone Noise Canceling Microphone reduces unwanted background noise and the noise-canceling microphones reduce unwanted background noise and are ideal in crowded and noisy, open office environments. UC Plug-And-Play - Jabra devices feature intuitive call control and seamless connection to all leading UC applications and softphones. 3yr Warranty Kevlar-reinforced cord HD Voice - High quality audio for crystal clear conversations Enjoy high-definition sound with HD Voice and get crystal clear, intelligible communication