Ultra-elegant Gigabit IP Phone , 4.3" 480 x 272-pixel color display with backlight , Opus codec support , Dual USB ports , T4U Auto-P template unified , T4U firmware unified , Up to 16 SIP accounts , Dual-port Gigabit Ethernet , PoE support , USB headset and EHS support , Wi-Fi via WF40/WF50 , Bluetooth via BT40/BT41 , USB recording , Supports expansion modules , Stand with two adjustable angles , Wall mountable