□√ 3.5-inch main color screen and 2.4-inch extended screen for DSS keys □√ HD audio on speakerphone and handset □√ Support 6-way audio conference □√ 4 Line keys on the main display □√ 6 DSS keys on the extended screen, up to 30 DSS keys via 5 pages □√ Built-in Bluetooth 4.2, support Bluetooth headset; support Wi-Fi Dongle □√ Support EHS wireless headset □√ Dual Gigabit ports, integrated PoE □√ Stand with 2 adjustable angles of 45 and 50 degree