["A revolutionary SIP phone to increase productivity Designed for busy executives and professionals, the SIP-T46U IP phone is an ultimate communication tool. The phone has an attractive high-resolution TFT color display that looks brighter and more vibrant. With Yealink Optima HD Voice technology and Opus wideband codec, the T46U offers excellent audio quality and crystal-clear voice communication. The T46U also offers two USB ports in one phone, which you can use freely as needed. Yealink's new T4U series offers the same elegant look as the T4 series, but with improvements for interoperability and better collaboration. User interface features", "4.3\" color screen with backlight audio features", "Optima HD voice output with acoustic shield and intelligent noise filtering Basic features e", "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"]