Jabra BIZ 2325 QD DUO Wired Professional Headset Crystal clear sound - breath resistant microphone with noise cancellation Advanced build - durable reinforced cord Protect hearing - PeakStop instantly removes any harmful sounds before they reach ears, keeping sound level at safe range Superior comfort - light design with padded ear cushions and 360 degree flexible spin boom arm Works with desk phones and soft phones - QD headsets require a connection cable (Jabra Link180, Link 220 or Jabra Link 280). Check Jabras site for compatibility with phone system.