POLY Edge E550 IP Phone and PoE-enabled. Product type: IP Phone, Product color: Black, Handset type: Wired handset. Lines quantity: 12 lines. Display: IPS, Display diagonal: 5", Display resolution: 800 x 480 pixels. Voice codecs: G.711alaw, G.711ulaw, G.722, G.722.1, G.729ab, OPUS, iLBC. Ethernet LAN interface type: Gigabit Ethernet, Ethernet LAN data rates: 10,100,1000 Mbit/s, Wi-Fi standards: 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n)