Core Features: Red Dot [2021] Android 9.0 5-inch multi-touch screen with 720 1280 resolution Optimal HD audio, full duplex technology Yealink Noise Proof Technology 20-foot (6-meter) and 360-degree voice pickup Built-in 12-microphone array for voice pickup Built-in 1-microphone array for noise cancellation Power over Ethernet 10-way conference call Hybrid UC meeting Built-in Wi-Fi (2.4GHz/5GHz, 802.11a/b/g/n)