NVR501-B Series 1 HDD 4-ch 1U Network Video Recorder • Support Ultra 265/H.265/H.264 video formats • 4/8/16-channel input • Support mainstream cameras of ONVIF conformance(Profile S, Profile G, Profile T ) and RTSP protocols • HDMI and VGA simultaneous output • Up to 16 Megapixels resolution recording • ANR technology to enhance the storage reliability when the network is disconnected • Support cloud upgrade