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 screen, 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 has two USB ports that enable Bluetooth, Wi-Fi, USB headset, and USB recording, allowing you to use 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 assistant in the office, enabling Bluetooth, Wi-Fi, USB headset, and USB recording, and you can freely use two of them according to your needs to expand the phone's capabilities.