Introducing the Icy Dock MB994SP-4SB-1 Full Metal Quad Bay 2.5" SATA 6Gbps backplane for use in a single 5.25" device bay. The MB994SP-4SB-1 is predicated off the incredibly popular MB994SP-4S, while taking its general concept but, with a SATA only interface and adding the fan power switch. In addition, there is only one 4 pin power connector that will reduce the amount of cables required. The MB994SP-4SB-1 allows for many more users to use this backplane in their homes with the reduced cost. The dual 40mm cooling fans to in addition to the power switch for the fans allow for the best flexibility - Turn off when using SSD's and on when using mechanical SATA hard drives. Furthermore, this device utilizes Active Power Technology, so that the device only power up if there are drives installed.