Features 4.3′ 480 x 272-pixel color display with backlight Adjustable LCD screen Built-in Bluetooth 4.2 Built-in dual band 2.4G/5G Wi-Fi (802.11a/b/g/n/ac) USB 2.0 port for USB recording, wired/wireless USB headsets and EXP50 Up to 16 VoIP accounts Dual-port Gigabit Ethernet PoE support HAC Handset Paperless label design Wall mountable Especially designed for busy executives and professionals, Yealink SIP-T54W is an easy-to-use Prime Business Phone with an adjustable 4.3-inch color LCD screen that you can easily and flexibly find the comfortable viewing angle according to the personal and environmental needs. With the built-in Bluetooth 4.2 and the built-in dual band 2.4G/5G Wi-Fi, the SIP-T54W IP Phone ensures you to keep up with the modern wireless technology and take the first chance in the future wireless age. Its built-in USB 2.0 port allows for USB recording or a direct wired/wireless USB headset or up to three Yealink EXP50 expansion modules connection. Benefiting from these features, the Yealink SIP-T54W is a powerful and expandable office phone that delivers optimum desktop efficient and productivity.