The Yealink SIP-T57W is designed as an easy-to-use, high-quality business phone for executives and business people. The 7-inch adjustable multi-point touchscreen not only allows you to easily and flexibly find a comfortable viewing angle that suits your personal and environmental needs, but also benefits from a high-quality visual display and convenient one-touch navigation. With integrated Bluetooth 4.2 and dual-band Wi-Fi 2.4G/5G, the SIP-T57W IP phone ensures that you keep up with modern wireless technology and are at the forefront of the future wireless era. The integrated USB 2.0 port enables USB recording or connection to a direct wired/wireless USB headset or up to three Yealink EXP50 expansion modules. This makes the Yealink SIP-T57W a powerful and expandable office phone that offers optimal desktop efficiency and productivity.