["A Revolutionary SIP Phone with a 7-inch Touch Screen Yealink presents a dynamic business communication solution to executives and professionals with the new SIP-T48U IP phone. The phone employs an appealing large touch screen that makes the switch between pages and applications swift, easy and convenient. United Yealink Optima HD Voice technology and wideband codec of Opus, the T48U awards you the superb audio quality and crystal-clear voice communications. Furthermore, the T48U puts dual USB ports in a phone that makes Bluetooth, Wi-Fi, USB headset and USB recording come true, and you can use any two of them according to your needs. The Yealink new T4U series offers the same elegant appearance as the T4 line, but with improvements for greater interoperability and better collaboration. Yealink T48U SIP Phone | Features at a Glance User Interface Features", "7\" color touch screen with backlight audio features", "Optima HD voice with Acoustic Shield and Smart Noise Filtering Basic Features", "Up to 16 SIP accounts", "PoE support", "Stand with two adjustable angles, wall mountable advanced features", "Wi-Fi via WF40/WF50, Bluetooth via BT41", "Support expansion modules", "Support USB recording connectivity", "Dual USB ports, dual port Gigabit Ethernet", "Headset, EHS support"]