Yealink T46U is midrange desk phone for office and knowledge workers who need a familiar device with top-class audio. T46U has a large, full color display with 10 line keys and 4 soft keys, plus dedicated call-handling buttons. The phone features Yealink Optima HD audio quality, giving you rich, natural sound from the hearing aid compatible handset and full-duplex speakerphone. T46U offers multiple options for connecting a headset. Use the USB port for a plug-and-play USB headset. The RJ9 port supports wired headsets. You can connect a wireless Bluetooth headset by using a Yealink BT40 or BT41 Dongle (not included). If you want wireless network connectivity, Yealink also offers the WF40 and WF50 Wi-Fi Dongles (not included).