Polycom VVX 450 is a business IP phone designed for performance. Gigabit Ethernet speed, extensive networking and communications features, 12 line appearances, open SIP support—all these combine to provide a superior VoIP deskphone. VVX 450 uses Polycom HD Voice technology to deliver natural wideband audio. Connect a headset using the dedicated RJ9 port. Use the full-duplex speakerphone with Acoustic Clarity technology for distraction-free conversations. A USB port is built in for media and storage applications.