Yealink SIP-T31G , Classical IP Phone , 2.3″ 132×64-pixel graphical LCD with backlight , Yealink HD Voice , Up to 2 SIP accounts , Opus codec support , Headset support , T3 firmware unified , Dual-port Gigabit Ethernet , Wall mountable , PoE support , Stand with 2 adjustable angles, without PSU.