SIP-T43U; Ultra-elegant Gigabit IP Phone;3.7" 360x160-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;without PSU, optional wall mount bracket, add up to 2 expansion modules (sidecar / attendant console, supports YDMP / YMCS. Optional AC power supply.