A versatile choice works with pcs and mobile phones via bluetooth a duo speaker headset designed for use with ip telephony and featuring noise cancellation technology the jabra biz 2400 headsets are part of a comprehensive family of headsets that raises the bar on corded headset quality and performance the jabra biz 2400 series features a cascade of improvements that pushes the envelope for the levels of audio quality comfort and durability necessary for dealing with the special requirement