Brand New The VoIP Lounge replacement handset with HD Voice for Polycom VVX
Series IP Phones: 300 301 310 311 400 401 410 411 500 501 600 601 1500 Black. Compatible only with the specific Polycom model business phones listed above.
NOT compatible with models: VVX 250 / 350 / 450 (DOES NOT FIT) NOT compatible with Polycom Soundpoint IP Phones 300 301 331 430 500 501 600 601 (DOES NOT FIT)