Introducing the MB994IPO-3SB, a full metal mobile rack backplane capable of storing two 2.5" SATA / SAS SSD/HDD and one Slim Optical Disk Drive (ODD) slot in a 5.25" device bay. It?s a perfect device designed for small form factor system or server such as: IPC, HTPC, NAS, Home Servers and All-In-One computers. A single 40mm cooling fan with on / off switch assists the drives to run at their optimal temperatures. The included EZ Slide Mini Trays allow multi drive interchangeability between other compatible Icy Dock products. This device is suited for applications such as: Medical & Military systems, Media servers, IPCs, HTPC, and All-In-One computers.