Western Digital AV-GP WD10EURX 1TB IntelliPower 64MB Cache SATA III 6.0Gb/s 3.5" Internal Hard Drive [Certified Refurbished]- w/1 Year Warranty This Certified Refurbished product is tested and inspected to look and work like-new, with limited to no signs of wear. The product comes with relevant accessories and a minimum one-year warranty. 1TB Capacity, Intellipower (5400RPM~7200RPM) Rotation Speed, 64MB Cache 3.5" Internal Hard Drive, SATA III 6.0Gb/s, Lower Power & Heavy Duty 24/7 For Surveillance, set-top boxes (PVR, DVR, NVR and IPTV), media servers and media centers. Passed WD Diagnostic Software + RE-CERTIFIED by State-of-the-Art software - Full "Sector-by-Sector" test to ensure best HDD quality! ZERO Bad Sectors!