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. Integrated with Hall Switch, T48U gives you a quieter operation and environment. United Yealink Optima HD Voice technology, the T48U awards you the superb audio quality and crystal-clear voice communications. Moreover, 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 freely 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. The T4U series better builds the Yealink ecosystem and is compatible with more Yealink headsets, supporting intelligent channel switching and using the phone to configure and upgrade headset.