The Icy Dock MB971SP-B DuoSwap 2.5"/3.5" SATA Hot Swap Drive Caddy makes extra storage simple. The MB971SP-B only occupies a single 5.25" drive bay, however, it allows the interface of both a 2.5" and 3.5" HDD or SSD. Power input for the Icy Sock MB971SP-B Duo Swap Drive caddy only requires a single 15-pin HDD connection. Individual 7 pin SATA connections are used for the 3.5"/2.5" bays and SATA 3 drives are supported. The face of the MB971SP-B includes both power and eject buttons for both bays and there is also LED indicators for power and drive access.