SilverStone Milo Series SST-ML09B Black Acrylic and plastic front panel, 0.8mm steel body Mini-ITX Computer Case Motherboard Compatibility: Mini-ITX / Mini-DTX Front Ports: 2 x USB 3.0 / Audio 120mm Fans: Top: 1 x 120mm fan, 1500rpm, 18dBA External 5.25 Drive Bays: Slim optical 12.7mm or 9.5mm x 1 x0A(9.5mm compatibility limited to tray type) x0A(replaceable with 3.5 HDD x 1, 2.5 HDD x 2,or 120mm fan x 1) Internal 2.5 Drive Bays: 4 Expansion Slots: 2