In-Win 300W MicroATX Slim Desktop Case (IW-BL631.FH300TB) Case Type: slim desktop case External bay: 1x 5.25"; 1x 3.5" Internal bay: 2x 3.5"; 1x 2.5" Expansion Slots: 4x Low profile expansion Slots Cooling system: 80mm side fan vent (fan not included); removable Air filter