Dshot&reg; Aluminum alloy 5.25'' Inch Bay Tray Less Mobile Rack with Aluminum door for 3.5'' Inch and 2.5'' Inch SATA III HDD with Extra 2 Port USB 3.0,Blue Accommodates both 2.5" and 3.5" Hard Drives Unique anti-shock DesignBuilt-in USB 3.0 19-pin Header Cable (24") File transfer speeds up to 6Gbps when paired with SATA III HDD and controller HDD Power Switch (Controls Both HDD) Aluminum alloy case and door,blue color for the door