This product is either discontinued or we cannot get that from suppliers.
Jabra Biz 2400 Ii Duo Usb Mic 2499-823-209, Headset Bluetooth, Wired USB, Portable electronics, computer communication, On-ear convertible, Frequency Response 60 - 1600 Hz, Max Input Power 20 mW, Microphone Boom, Control Volume, mute button, answer/end, programmable button.
The Jabra BIZ 2400 II Duo USB/NC/BT/MS Headset is a variant that has USB connector and also ready for Bluetooth which enables you to communicate through your smartphone or tablet by connecting the headset to your Bluetooth-enabled mobile device.