Up to 16 channels of 720p or 8 channels of 1080p HD audio/video real-time recordingFully customisable recording rules; time-based, event based, manual or automaticAutomatic discovery of GrandstreamThe GVR3552 can be viewed and managed by connecting the GVR3552 directly to a TV or computer monitor or through the web user interface. The GVR3552 supports all Grandstream IP Video surveillance cameras and IP Video Encoders/Decoders and can automatically detect these devices. U sers can save up to 4TB of video files on the device by connecting up to 2 hard drives (hard drives not included).