Specifically designed for use in NAS systems with up to 8 bays Tested for 24x7 reliability NASware firmware for compatibility 1-year limited warranty Small and home office NAS systems in a 24x7 enviornment Package includes a hard drive only - no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessary. Ships in WD-certified box for safe transit during shipping Capacity: 2 TB Rotational Speed (RPM): IntelliPower Cache: 256 MB Interface: SATA3 Data Transfer Rate: 6 Gb/s Buffer to Host (max); 145 MB/s Host to/from drive (typical) Fo model : WD Red 2TB NAS Internal Hard Drive - 5400 RPM Class tag : Internal Hard Drives