Built-in a USB port, support Bluetooth headset (through USB dongle) support Bluetooth headset (through USB dongle);Up to 6 SIP accounts;PoE support Up to 6 SIP accounts PoE support The SIP-T46G is Yealink latest revolutionary IP Phone for executive users and busy professionals. New designs appears the commerce, with high- resolution TFT color display, delivering a rich visual experience. Yealink Optima HD technology enables rich, clear, life-like voice communications. Supports Gigabit Ethernet, a variety of device connections, including EHS headset and USB. With programmable keys, the IP Phone supports vast productivity-enhancing features.