Yealink SIP T4 (U) Series T43U PoE Business

T43U: ? 3.7" 360x160-pixel graphical LCD with backlight ? Dual USB ports ? Dual firmware images ? 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 color-screen expansion modules ? Stand with 2 adjustable angles ? Wall mountable