Jabra BIZ 2400 3-in-1 Mono Corded Headset for Deskphone with 3 Wearing Styles 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. Talk in Comfort - Assure total comfort with a wide range of styles that match your individual needs and personal fit requirements. 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