Cisco Unified IP Phone 8851 Convenient end device for professional use and smartphone support - 12.7 cm (5") high-resolution (800 x 480) widescreen VGA backlit colour display - 5 call numbers/lines - 10 programmable line, function and session keys - 4 context-sensitive soft keys - Speakerphone - RJ9, USB and Bluetooth headset connection - Electronic Hook Switch - PoE 802.3af USB power (can be used to charge a smartphone) - Intelligent Proximity lets you integrate your smartphone - 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 3: < 12.95W - Can be upgraded with 2x Cisco Unified Key Expansion Modules - Also available in white PoE device (power adapter or cable not included, see accessories) A Unified Communications Manager is required for use.