Cisco Unified IP Phone 8811 Ergonomic design for extended use - 5" high-resolution (800 x 480) widescreen VGA backlit grey-scale display - 5 call numbers/lines - 10 programmable line, function and session keys - 4 context-sensitive soft keys - Speakerphone - RJ9 headphones jack - Electronic Hook Switch - G.722 wideband audio - Integrated 10/100/1000 Ethernet switch - Dedicated keys for headphones, speakerphone, microphone mute, call forwarding, conference call, call park, phone directory, messages and settings - Power Save Plus-ready (Green) - PoE (IEEE802.3af) class 2: < 6.49W - Cannot be upgraded with Cisco Unified Key Expansion Modules - Colour: White PoE device (power adapter or cable not included, see accessories) A Unified Communications Manager is required for use.