X210i VoIP SIP visualization paging console telephone with gooseneck microphone, 2 x Gigabit Ethernet, 10 x line keys, PoE required, AC optional (SKU #PS5V2A), 4.3 inch colour main LCD, 2 x 3.5 inch side color displays for DSS keys, HD audio, Bluetooth, USB, optional Wi-Fi USB adapter (SKU #FNWF20), RJ9 headset jack, EHS support for specific Plantronics headsets (CS 500 series, Savi 700 series, Voyager Legend CS, SKU's required #PLGEHS80 and SKU #PL8563801) and specific Jabra headsets (Jabra Pro 920 / 925 series, SKU required #FNEHS20).