This is a batch of ten new replacement handsets for the Avaya/Lucent Definity 6400 series of phones, a list of specific compatible model numbers is shown in the list below.  These handsets are gray in color.  If your phone is having issues with poor sound a handset replacement may be whats needed to solve the problem.  These handsets are NEW!!!  It comes with a 30-day warranty.

This handset will work on the following Avaya/Lucent phones:
6402
6408
6408D
6416D
6416D+M
6424D
6424D+M