The SIP-T41S is a feature-rich business tool for superior communications & extended functionality. It offers a faster, more-responsive interface than the T41P & several performance-enhancing functions. It’s a six-line IP phone that comes with built-in programmable keys to enhance productivity. The SIP-T41S with Yealink Optima HD Voice technology & wideband codec of Opus delivers superb audio quality & crystal clear voice communications. With an all-new USB (Universal Serial Bus) port, the SIP-T41S boasts unparalleled functionality & expansibility with Bluetooth, Wi-Fi & USB (Universal Serial Bus) recording features. The Yealink’s new T4S series offers the same elegant appearance of the T4 line, but with improvements for greater interoperability & collaboration.