Yealink SIP-T31G, Business Phone, 2.3" Display, 132 x 64 pixel, Graphical LCD with backlight, Yealink HD Voice, PoE support, Opus codec support, Up to 2 SIP accounts, Local 5-way conferencing, EHS Wireless Headset Support, Unified Firmware, Support YDMP/YMCS, Stand with 2 adjustable angles, Wall mountable, 01 Year Limited Warranty Equipped with powerful chip, the T3 series owns a stronger computing ability and more upgraded functions, which ensures a higher productivity and smoother office experience. Due to great performance, T3 series is capable to extend more services for different business demands.