The Jabra GN1218 is a smart cord for connecting a wide range of headsets to desk phones. The cord enables different microphone setting levels which allow the microphone amplification to be adjusted in order to facilitate better transmitted sound. The standardised QD (Quick Disconnect) plug will fit most headsets, while there is a RJ9 connector for the majority of desk phones. The cord is compatible with Jabra Biz 1500, 2300 and 2400 II headsets and with Cisco IP 78xx/88xx phones series and most standard desk phones using permutation A or B. Simply connect the Jabra GN1218 cord and Jabra headset through the Quick Disconnect plug and set the microphone level to your preference.