Product Description M/B Type: XL-ATX, ATX, MicroATXMaterial: Steel, PlasticExternal Bay: 4x 5.25″, Internal Bay: 2x 2.5″Expansion Slots: 9Fan: 8Front I/O Panel: 2x USB 3.0 Ports, 2x USB 2.0 Ports, 1x Audio/Mic, SD Card Reader (with SDHC&SDXC Support)