Core Features: Built-in dual band 2.4G/5G Wi-Fi (802.11a/b/ g/n/ac) USB 2.0 port for wired USB headsets/Bluetooth headsets Yealink HD Voice 2.4 320 x 240-pixel color display with backlight Dual-port Gigabit Ethernet PoE support Opus codec support Up to 4 SIP accounts Local 5-way conferencing Support EHS Wireless Headset Unified Firmware Support YDMP/YMCS Stand with 2 adjustable angles Wall mountable Handset with hall switch.