Optimal HD audio, full duplex technology Yealink Noise Proof Technology 20-foot and 360-degree microphone pickup range Two additional CP Wireless Expansion Mic CPW90 Built-in 3-microphone array Based on Android 5.1 operating system 5-inch multi-touch screen with 720x1280 resolution Yealink Pentagon Meeting Room 5-way conference call Hybrid UC meeting Built-in Wi-Fi/Bluetooth Connect to PC via USB Micro-B port
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