The Yealink SIP-T55A SfB, compatible with Microsoft® Skype For Business and Office365, is ideal for your workplace. The Android-based T55A phone not only has a 4.3-inch capacitive touch screen, but also has an improved Skype for Business user interface. Optima HD and Yealink Noise Proof technologies ensure excellent voice transmission quality. You can connect a wireless Bluetooth headset to the phone with the Yealink BT41 USB adapter or provide access to the WiFi network with the Yealink WF50 USB adapter.