Yealink Ultra-elegant Gigabit IP Phone 3.7″ 360×160-pixel graphical LCD with backlight, Dual USB ports, Opus codec support, T4U Auto-P template unified, T4U firmware unified, Up to 12 SIP accounts, PoE support, USB headset and EHS support, Wi-Fi via WF40/WF50, Bluetooth via BT40/BT41, Supports expansion modules, Stand with 2 adjustable angles, Wall mountable.