Seagate SkyHawk 4TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST4000VX007)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Custom-built for surveillance applications with Image Perfect firmware for crisp， clear， 24×7 video workloads</li><li>Maximum 180TB/year workload rating—3× the workload rating of desktop drives—for reliable performance in write-intensive surveillance systems</li><li>Rotational vibration (RV) sensors help maintain performance in RAID and multi-drive systems (4TB or higher)</li><li>Up to 10TB of capacity to store up to 10，000 hours of HD video</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51uABYewbGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51VHYy2VnDL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51tWxy-%2BlBL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51fqRL594ML.jpg" noproxy>