20 SIP lines, 3-way conference, hotspot· HD audio on speakerphone and handset· 4.3" main color display· Built-in Bluetooth· 2×3.5" side color displays for DSS keys· Up to 106 DSS keys (42 tri-colored physical keys)· Dual Gigabit ports, integrated PoE· Wi-Fi connectivity (via Wi-Fi dongle)· Support EHS headset· Video Codec H.264 support for receiving video calls· Stand with 2 adjustable angles of 40 and 50 degrees· Compatible with major platforms: 3CX, Asterisk, Broadsoft,    Metaswitch, Avaya etc.youtube video: https://www.youtube.com/watch?v=yGdZXS7cyVM