Support Ultra 265/H. 265/H. 264 video formats - 64-channel input - Support mainstream cameras of conformance(Profile S, Profile G, Profile T ) and RTSP protocols - VGA and HDMI independent output (NVR508-64B simultaneous output by default, independent output configurable) - Up to 12 Megapixels resolution recording - 8 SATA HDD, up to 12TB for each HDD - Support N+1 Hot spare - ANR technology to enhance the storage reliability when the network is disconnected - Support cloud upgrade