6 line keys with LED, programmable up to 15 features with 3 page view. 2.7″ 192×64-pixel 4-level grayscale LCD with backlight. 2xRJ45 10/100M Ethernet port, 1xRJ9 (4P4C) handset port, 1xRJ9 (4P4C) headset port. Integrated IEEE 802.3af PoE. Supports FTP, TFTP, HTTP, and HTTPS protocols. Yealink Optima HD voice, wideband technology, advanced acoustic clarity technology. Full duplex, hands-free speakerphone with AEC. Supports Yealink YHS32 headset.