4-MP 1/1.8" CMOS image sensor, low luminance, and high definitionimage. Outputs max. 4 MP (2688×1520) @25/30fps. 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. Built-in IR LED, and the max. illumination distance is 50m(164.04 ft)(IR) ; ROI, SVC, SMART H.264+/H.265+, AI H.264/H.265, encoding afterfilter, flexible coding, applicable to various bandwidth and storageenvironments. With deep learning algorithm, it supports: video metadata, smartsound detection, IVS, face detection, smart object detection, andpeople counting, etc. Alarm: 1 in, 1 out; audio: 1 in, 1 out; supports max. 512 GB Micro SDcard, built-in MIC.