Jabra PRO 920 service cord is required if the headset requires a firmware update.
Service Cord is plugs into the AUX out on the base station of the headset and then USB into the PC.
This cable is optional only.
Bundle deal on Jabra Service Cable for PRO 920
|Verbatim Ultra-Slim 1200 mAh Power Pack worth £14.98 | while stocks last|
Bundle savings are calculated against the cost of buying items separately