The SIP-T43U IP phone is a feature-rich business tool for excellent communications and extended functionality. It is a 12-line IP phone that comes with a 3.7-inch large black-and-white screen and the EXP43 support. United Yealink Optima HD Voice technology and wideband codec of Opus, the T43U awards you the superb audio quality and crystal-clear voice communications. The phone feels quicker and more responsive when performing call features. Moreover, the T43U 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 Yealink EXP43 Color Expansion Module for Yealink T43U/T46U/T48U IP phones, is designed to expand the functional capability of your SIP phone to a whole new level. It features a large 4.3-inch color-screen LCD, giving you a vivid visual experience. In addition, it provides you with a simple user interface and advanced call handling capabilities. For example, three pages of 20 flexible button shown on the display can be programmed up to 60 various features. The functionality of Yealink T43U/T46U/T48U IP phones will also be extended by the EXP43, you can set the provided multifunctional line keys as BLF, speed dial, call forward, transfer, call park, call pickup, etc. The Yealink EXP43 Color Expansion Module is an ideal solution for receptionists, administrative assistants and contact center workers and gives you the ability to monitor contacts and manage a large volume of calls with ease.