Yealink Cp925 Ip Conference Phone 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"