This is a pre-owned Plantronics DA80 USB audio processor in good condition.  You will find some cosmetic wear from being used primarily in the button area and the back of the DA80 with some minor scuffs and scratches.  Please take the time to review all photos for condition. Plantronics designed this audio processor to connect to any Plantronics headset to enable advanced audio processing features which include noise and echo cancellation. The serial number on this Plantronics DA80 is 1BR9GW.  Note - this is only the DA80 USB Audio Processor and does not include the headset or any operating manuals.