The T-7-SA 1x 5.25" High Performance SATA/SAS 300 Mb/s Mobile Rack by iStarUSA is a high quality, military type aluminum hot-swappable mobile rack. The versatile T-7-SA is compact, tough, flexible and delivers a high performance SAS/SATA interface. It includes an additional fan that provides extra cooling in the worst operating conditions. The T-7-SA has an LED indicator that helps you keep watch on power and hard drive activities. The T-7-SA's security lock prevents intrusion and data theft.