Audio Features • HD handset, HD speaker • Hearing aid compatible (HAC) handset, magnet handset • Yealink Noise Proof Technology • Full-duplex hands-free speakerphone with AEC • VAD, CNG, AEC, PLC, AJB, AGC Display and Indicator • 7" 800 x 480 capacitive touch screen • 5 points multi-touch surface • Multilingual user interface • Modern Teams interface, full keyboard • LED for call and message waiting indication Interface • Dual-port Gigabit Ethernet • Power over Ethernet (IEEE 802.3af), class 3 • Built-in dual band 2.4G/5G Wi-Fi • Built-in Bluetooth • 1 x USB Type A port • 1 x Security lock port • 1 x RJ9 (4P4C) handset port • 1 x RJ9 (4P4C) headset port • Power Adapter (Optional) Network and Security • IPv4/IPv6 • IP Assignment: Static/DHCP • HTTP/HTTPS web server • Time and date synchronization using SNTP • Transport Layer Security (TLS) • HTTPS certificate manager • Digest authentication using MD5/MD5-sess • IEEE802.1X