The BIZ 2400 II offers outstanding sound at both ends of the call for a superior customer experience. Up to 40% lighter than competing headsets and with a low headband pressure, the Biz 2400 II allows the agent to focus on their customer conversation in unrivalled comfort. The Jabra BIZ 2400 II QD Duo is a duo headset with a QD (quick disconnect) plug that provides instant connectivity to a wide range of deskphone systems. The Jabra BIZ 2400 II QD Duo is a duo headset with a QD (quick disconnect) plug that provides instant connectivity to a wide range of deskphone systems.