HDRMK-ISA1T5-SA is a mobile rack for use with 3.5" SATA I/II hard drive. The storage capacity of the hard drive is unlimited. The trayless and screwless design is for fast and easy installation. The anti-vibration air cushion design gives hard drive an extra protection from damage. Blue LED indicator enables monitor power and hard drive activities. Security key-lock prevents intrusion and theft to the most important data.