StarTech 3-Drive 2.5"/3.5" Removable Mobile Rack SAS/SATA Backplane: * Supports 2.5" and 3.5" form factor SAS or SATA hard drives * Easy to use and lockable removable drive trays * Audible temperature warning buzzer * Independent power switches for each drive * LED status indicators for each drive * Sturdy aluminum and steel construction * 80mm rear mounted, ball-bearing cooling fan * High/Low fan speed controls * Fan sensor reset switch * Plug and play and hot swappable