Polycom SoundPoint IP 331 Phone POE, Power Supply Not Included Full-Duplex IEEE 1329 Type 1-Compliant Speakerphone. 102 x 331-pixel Graphical LCD Display, 3-way Conferencing. Single 10/100 Ethernet Port, Built-in XML Microbrowser. Dedicated Feature Keys, 4-way Navigation Key Cluster. 802.3af POE (Power Over Ethernet) Power Supply Not Included.