Additional Details ------------------------------ Product description: Replacement Desk Stand Mount Bracket for Polycom Phones. Attaches to bottom of the phone to provide support for desktop style situations. Compatible with Polycom Phones: VVX300IP, VVX301IP, VVX310IP, VVX311IP, VVX400IP, VVX401IP, VVX410IP, VVX411IP, VVX500IP.