"Optima HD IP Conference Phone • Wrapped with flannel • New UI • Androd 9.0 • 5-inch multi-touch screen with 720x1280 resolution • Optimal HD audio, full duplex technology • Up to 2 wireless DECT Mic CPW65-DECT-Duo (Optional) • Up to 1 wireless Bluetooth Mic CPW25-BT-Single (Optional)(pending) • Yealink Noise Proof Technology • 20-foot (6-meter) and 360-degree voice pickup • Built-in 12-microphone array, 360-degree voice pickup • Power over Ethernet • 10-way conference call • Hybrid UC meeting • Built-in Wi-Fi 2.4GHz/5GHz, 802.11a/b/g/n • Built-in Bluetooth 4.2 • Local USB call recording • Local 3-way PSTN conference via Yealink CPN10 without PSU"