●4K Ultra HD 4K ultra high definition, provides up to 4K@30fps/25fps image coding output, and downwards compatibility with 1080p, 720p resolution, etc. ●Intelligent teaching tracking Built-in leading image recognition and tracking algorithm, achieve smooth and natural tracking effect.Different lenses are assembled before production, so as to achieve teacher tracking or student tracking. ●Local storage Support U disk local storage, local recording directly without NVR. ●AF (Auto Focus)Lens Customized auto focus lens without distortion and viewing angle is optional 46°/84°/ 120°. At the same time, it supports EPTZ to make it more biger and visible. (120° viewing angle does not support AF). ●Built-in Microphone Built-in microphone array picks up sound up to 9 meters equally from all directions.Unique nosie reduction algorithm can present your voice accurately. ●Low Lighting High quality CMOS sensor and 2D/3D noise reduction can reduce image noise.The Image is still clear and sharp even in low light enviroment, and the SNR is high more than 55dB. ●Support WiFi (optional) WiFi function provides network connections in wireless environments. ●Support PoE The cable network supports PoE，power supply, control, video and audio can be transmited by only one network cable.