General Features Android 9.0 OS 5 capacitive touch screen Black acoustics fabric resistant to water/oil/stain Audio Features Optimal HD audio Yealink Noise Proof Technology Smart Noise Filtering 20-foot (6-meter) microphone pickup range Built-in 12-microphone array for 360-degree voice pickup Built-in microphone for noise cancellation Full-duplex speakerphone with AEC Phone Features 10-way conference call Analog PSTN calls via Yealink CPN10(optional) Connectivity Built-in Bluetooth/Wi-Fi Power over Ethernet (IEEE 802.3at) class 4 1 USB 2.0 Type A port 1 x USB 2.0 Type-C port Advanced Features Supports DECT wireless expansion microphone CPW65 (*pending) Supports Yealink Device Management Platform