["A revolutionary SIP phone with 7-inch touchscreen With the new IP phone SIP-T48U, Yealink offers executives and professionals a dynamic business communication solution. The phone has an attractive large touchscreen that makes switching between pages and applications quick, easy and convenient. With Yealink Optima HD Voice technology and Opus wideband codec, the T48U offers excellent audio quality and crystal-clear voice communication. Additionally, the T48U offers two USB ports in one phone, which you can freely use as needed. Yealink's new T4U series offers the same elegant look and feel as the T4 series, but with improvements for interoperability and better collaboration. User interface features", "7\" color touchscreen with backlit audio features", "Optima HD voice output with acoustic shield and intelligent noise filtering Basic features", "Up to 16 SIP accounts", "PoE support", "Stand with two adjustable angles, wall mounting possible. Advanced functions", "Wi-Fi via WF40/WF50, Bluetooth via BT41", "Support for expansion modules", "Supports USB recording connectivity options", "Two USB ports, two port Gigabit Ethernet", "Headset, EHS support"]