The SIP-T43U IP phone is a feature-rich business tool designed for excellent communication and enhanced functionality. It is an IP phone with 12 lines, a 3.7-inch black-and-white display, and EXP43 support. With Yealink's Optima HD Voice technology and the Opus wideband codec, the T43U delivers outstanding audio quality and crystal-clear voice communication. The phone feels faster and more responsive when executing call functions. Additionally, the T43U features two USB ports that enable Bluetooth, Wi-Fi, USB headsets, and USB recording, allowing you to utilize two of these options as needed. Yealink's new T4U series maintains the same sleek appearance as the T4 series but includes improvements for greater interoperability and better collaboration. With two USB ports, the T43U is your right-hand tool in the office, facilitating Bluetooth, Wi-Fi, USB headsets, and USB recording, and you can freely use two of these options according to your needs to enhance phone functionalities.