Yealink Prime Business Phone, 3.7″” 360*160 pixels graphical 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 12 VoIP accounts, Optimal HD audio, HAC Handset , Paperless label design , Wall mountable , IEEE 802.3af PoE support, without PSU.