Polycom VVX 401 2200-48400-025 12-line Business Media Phone - AC Adapter Not Included 3.5-inch TFT Color LCD Display (320x240) 12 line Operation HD Voice up to 7KHz, SIP Voice Over Internet Protocol (VoIP) Dual-Port 10/100 Ethernet, 4-Way Navigation Cluster with Center Select Key Asian Character Support, Hearing Aid Compatible, Supports VVX Expansion Module 802.3af Power Over Ethernet, Optional AC Adapter (Sold Separately)