2. Support 8-bay Hot-Swappable SATA Hard Disk

3. SAS JBOD and iSCSI Storage Expansion

4. Enterprise Hardware RAID Function for Data Protection

5. Built-in Enterprise VMS & Real-Time Video Intelligences

6. Support Web-based System Maintenance Tool (SurveOne)

7. Scalable Client-Server Architecture

More details: http://www.surveon.com/product/NVR5400E1.asp