Especially designed for busy executives and professionals, Yealink SIP-T53W is an easy-to-use Prime Business Phone with an adjustable 3.7-inch graphical LCD that you can easily and flexibly find the comfortable viewing angle according to the personal and environmental needs. 3.7" 360x160 pixel back light LCD display, 2 x Ethernet ports 10/100/1000 PoE support "Adjustable Screen ", Built-in Bluetooth 4.2, Built-in Dual Band Wi-Fi (2.4GHz & 5GHz 802.11ac) Opus codec support, Built-in USB 2.0.