HD audio, handset and speakerphone with support for wide-band audio 10 line keys with up to 5 SIP accounts - Swappable face plates to allow for easy logo customization 40 built-in digital BLF keys; available extension module offers 40 BLF/speed dial keys per module Integrated dual-band 802.11 a/b/g/n Wi-Fi - Integrated Bluetooth Dual switched auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE