Plantronics EncorePro HW291N & HW301N Corded Headset Date Codes

The date code of the EncorePro family of headsets will be located on the speaker, under the ear cushion.  If a binaural model, the code will be on the microphone side.  The first number represents the month (01=January, 02=February…).  The two numbers following the dash represent the year (05=2005).  Next is the model of the headset.  An “HW291” represents the EncorePro HW291 model and “HW301” represents the EncorePro HW301 model.  If an “N” is present, the headset is a noise-canceling model.  If an “R” is present, the headset has been re-manufactured or replaced by Plantronics.