Constructed of heavy-duty steel with 7.88 x 12.29 x 11.46 in. dimensions, Model WMC-906M accommodates up to five 3.5 in. mobile racks, one 3.5 in. or 2.5 in. internal drive bay with 2 USB 2.0 front ports, and 1 expansion slot. Mini-ITX motherboard chassis comes with one 120 mm ball bearing fan for temperature control and supports PS/2 ATX or Mini Redundant Power Supply. Equipped with key lock for security, wallmount/tower unit provides easy access for quick removal of hard drive.