7 inch (1024 x 600) capacitive adjustable touch screen Supports Yealink Bluetooth Handset BTH58 (Optional) Dual-port Gigabit Ethernet, supports PoE-Power Adapter NOT INCLUDED Built-in Bluetooth 4.2 and Dual Band 2.4G/5G Wi-Fi 2 x USB 2.0 ports for USB headset, media and storage applications Supports up to 3 Expansion Module EXP50 / Wall mountable 720p30 HD video Optimal HD audio, Yealink Noise Proof Technology Yealink’s SDK (Software Development Kit) DoorPhone Features (Preview, One-button Open, Monitoring)