4-MP 1/1.8" CMOS image sensor, low luminance, and high definitionimage. Outputs max. 4 MP (2688×1520) @25/30fps Built-in IR LED, and the max. illumination distance is 50 m (164.04 ft) (IR). Intelligence:IVS (Perimeter Protection),Smart Object Detection ,SMD 3.0 ,AcuPick ,AI SSA ,Face Detection ,People Counting ,Heat Map ,Video Metadata ,Smart Search ,Smart Sound Detection ,Alarm Event. Alarm: 1 in, 1 out; audio: 1 in, 1 out; supports max. 512 GB Micro SDcard, built-in MIC.