• 4'' 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 6-microphone array for 360-degree voice pickup • Built-in microphone for noise cancellation • Full-duplex speakerphone with AEC Phone Features • 5-way conference call • 3-way PSTN conference via Yealink CPN10(optional) Connectivity • Built-in Bluetooth/Wi-Fi • Power over Ethernet (IEEE 802.3af ), class 3 • 1 USB2.0 Type C port Advanced Features • Supports one Bluetooth wireless expansion microphone CPW25(*pending) • Supports Yealink Device Management Platform