The IP phone SIP-T43U is a feature-rich business tool 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 performing 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 them as needed. Yealink's new T4U series offers the same sleek appearance as the T4 series but with improvements for greater interoperability and better collaboration. With two USB ports, the T43U is your right-hand tool in the office, enabling Bluetooth, Wi-Fi, USB headsets, and USB recording, and you can freely use two of them according to your needs to expand the phone's capabilities.