Supports ATX power supplies of up to 180mm depth / Supports 1 x 2.5" SSD and up to 5 x 3.5" HDD / 5Gbps USB 3.1 Gen1 interface (downward compatible with USB 2.0 & USB 1.1) / Dual 5.25" expansion bay brings flexibility in installing 5.25" devices / Built-in fan bracket which supports up to three 80mm x 38mm fans / Supports up to ATX (12" x 9.6") motherboard / Supports 7 low profile expansion slots / Reserved mounting holes for sliding rails which can be easily installed. Can be used with RMS03-26 rail (rail slide sold separately)