User Interface Features• 4.3" color screen with backlightAudio Features• Optima HD voice with Acoustic Shield and Smart Noise FilteringBasic Features• Up to 16 SIP accounts• PoE support • Stand with two adjustable angles, wall mountableAdvanced Features• Wi-Fi via WF40/WF50, Bluetooth via BT41• Support expansion modules• Support USB recordingConnectivity• Dual USB ports, dual-port Gigabit Ethernet• Headset, EHS support