Grandstream Networks GVR3552 Business Network Video Recorder, RAID 0/1 Support Grandstream Networks GVR3552 Business Network Video Recorder - Grandstream Networks 1 Year Warranty Up to 16 channels of 720p or 8 channels of 1080p HD audio/video real-time recording Fully customizable recording rules; time-based, event based, manual or automatic Automatic discovery of Grand stream IP Cameras Up to 2 SATA 2.5" internal hard drives with maximum 4TB storage and RAID 0 or RAID 1 configurations