HP Poly Brand In-line Mute Switch 920P8AA Jabra Accessories Can ONLY be used with

Can ONLY be used with PLT QD compatible headsets

and then into the headsets bottom cord

Headset does not include the bottom cord

2m) Cord - 2

RJ9/11 clip on the other

HP Poly Brand In-line Mute Switch 920P8AA Jabra Accessories Can ONLY be used withPlantronics QD in line mute switch Mute switch can be added to the quick disconnect cable on any H or HW series headset Can use on any headset that has a Plantronics compatible quick disconnect on it Connects into the headsets QD, and then into the headsets bottom cord. Allows you to mute the microphone on Plantronics QD wired headsets (H series, HW series) Provides microphone privacy while allowing you to still hear the other party Connects to Quick