Model: 902A Dimension :180*445*420mm (W*L*H) Carton Dimension : 225*482*515mm (W*L*H) Drive Bays : 5.25"*4ea External 3.5"*1ea External 3.5"*6ea Internal Material : SECC Mainboard : ATX/Micro ATX N.W.:4.5KG G.W.:5.0KG Expansion Slots : 7 Slots Fan Space : 80*80mm 1ea(2ea option) Port : USB 1.0 x 2ea / MIC / SPK