Yealink Prime Business Phone, 4.3″” 480*272 pixels TFT LCD with adjustable screen, Built-in Bluetooth 4.2 and dual band 2.4G/5G Wi-Fi, Dual-port Gigabit Ethernet, USB 2.0 port for USB recording, wired/wireless USB headsets and EXP50, Up to 16 VoIP accounts, Optimal HD audio, HAC Handset, Paperless label design, Wall mountable, IEEE 802.3af PoE support, without PSU.