Dahua DHI-NVR616-128-4KS2 is an Ultra Series network video recorder used for large surveillance systems. This recorder has a new 4.0 user interface and self-adaptive decoding capabilities. It can access, store, or forward video at speeds up to 384 Mbps and has a simultaneous video output for VGA and HDMI1. It supports various camera perimeter performances such as AI search, face recognition, SMD, and ANPR, providing comprehensive surveillance for large-scale systems and 3D behavior analysis. This recorder has also a main processor of industrial-embedded microprocessors and runs on an embedded LINUX OS.