The Yealink SIP-T54W is an easy-to-use Prime Business Phone specially designed for busy executives and professionals with an adjustable 4.3-inch color LCD screen that can easily and flexibly find a comfortable viewing angle according to personal and environmental needs. With built-in Bluetooth 4.2 and built-in dual-band 2.4G / 5G Wi-Fi, the SIP-T54W IP phone ensures you keep up with modern wireless technology and take advantage of the first chance in the future wireless age. The built-in USB 2.0 port enables USB recording or the connection of a direct wired / wireless USB headset or up to three Yealink EXP50 expansion modules. Using these features, the Yealink SIP-T54W is a powerful and expandable office phone that provides optimal efficiency and effectiveness on the desktop.