Dual-OS design to ensure high reliability of system running ANR technology to enhance the storage reliability when the network is disconnected HDD hot swap with RAID0, RAID1, RAID5 and RAID10 storage scheme configurable Configurable normal or hot spare working mode to constitute an N+1 hot spare system. H.265/H.264/MPEG4 video formats Connectable to the third-party network cameras Up to 64 IP cameras can be connected Recording at up to 12 MP resolution HDMI1/VGA1 and HDMI2/VGA2 outputs provided HDMI1 Video output at up to 4K (3840 × 2160) resolution Up to 8 SATA interfaces and 1 eSATA interface connectable for recording and backup Storage space effectively saved by 50% to 70% with the use of H.264+ decoding format 2 self-adaptive 10M/100M/1000M network interfaces, and two working modes are configurable: multi-address and network fault tolerance