SpecificationsMfr Part Number: CA-I552USBCase: CA-IM552BCase Type: ATX Mid TowerColor: BlackMaterial: SGCC 0.4mm Steel; ABSM/B Type: MicroATX, ATXDrive Bays: 6External Bay: 1x 5.25", 1x 3.5"Internal Bay: 4x 3.5"Expansion Slots: 7Cooling System:Front: 1x 120mm Fan Vent (Fan not included)Rear: 1x 80/120mm Fan Vent (Fan not included)Side: 2x 120mm Fan Vents (Fans not included)Side Windows: NoFront I/O Panel: 2x USB 1.0 Ports, 1x Headset, 1x MicrophonePower Supply: 400W Power Supply; w/ 1x 24pin Connector & 2x SATA ConnectorsDimensions (WxDxH): 7.09 x 16.14 x 16.54 inchWeight: 5.73 lbsUSB Keyboard: KB-US919EBInterface: USBType: 107 Keys Basic KeyboardSleep/ Wake up/ Power - 3 Function KeysNum Lock/ Caps Lock/ Scroll Lock - 3pcs LED FunctionInput Power: 5 VLanguage Availability: EnglishColor: BlackSystem Requirement: Windows 7/ 98/ 2000/ ME/ NT/ XP/ Vista, Mac OS USB Mouse: MO-159UScroll Wheel: YesResolution: 1000 dpiMaterial: ABSInterface: USBColor: BlackSystem Requirement: Windows 8/ 7/