iStarUSA Server Chassis Cases D-400-BLUE Case Type: 4U Rack mount M/B Type: MicroATX, ATX; 12.0 x9.6 inch External: 1x 3.5", 4x 5.25" Internal: 2x 3.5" Cooling System: 1x 120mm Fan, 2x 80mm Fans (one optional) Front I/O Panel: 2x USB 2.0 Ports Indicators: Power, HDD, Temperature, Fan (Fan/Temp require sensor board TC-ISF08)