The Yealink T46S is an IP Phone designed for the business user who needs rich telephony features friendly UI and superb voice quality. It is equipped with Yealink Optima HD voice and wideband codec of Opus for superb sound quality and crystal clear communications. The Phone features 10 line keys with LED that can be programmed up to 27 various features. Six navigation keys and four soft keys provides intuitive user interface for higher productivity. Moreover T46S has the rich external interfaces including USB 2.0 port graphical LCD handset and headset ports. The USB port can be used to connect with a WiFi or Bluetooth adapter.