Hikvision DS-2DF5220S-DE4/W smart PTZ Dome Cameras are able to capture high quality images in the indoor environment such as classroom, office and library. Embedded with 1/3'' progressive scan CMOS chip and G-sensor makes DWDR and 2MP real-time resolution possible. With the 20X optical zoomDay/Night lens, the camera offers another choice for the indoor environment .Hikvision DS-2DF5220S-DE4/W smart PTZ Dome Cameras also features a wide range of smart functions, including face detection, intrusion detection, line crossing detection and audio exception, benefitting users with great improvement on security efficiency, more importantly, with key events / objects being recorded for further forensic needs. Thesefeatures, combined with smart tracking, which enables the camera to detect any progressively moving object and follow it within the camera's area of coverage without fault. Smart Defog and EIS (Electronic Image Stabilization) are further supported to improve image quality in challenging conditions.