Replacement Handset for Poly VVX X50HD Series Telephones Flat Black Handset Cord, 12' (Stretched), 220 mm Tail Compatible with Poly VVX X50HD Series Telephone Systems VVX150, VVX250, VVX350, VVX450 Any brand names listed on this site are trademarks of their respective companies and are used for the purpose of determining product compatibility only. sandman.com makes no claims of affiliation or alliance with any of these manufacturers.