Thermaltake Office Products Computer Case Motherboard Compatibility: Micro ATX / ATX / Mini-ITX Front Ports: 2 x USB 3.0 / 2 x USB 2.0 / 1 x Headphone / 1 x Mic Ports 120mm Fans: Rear (exhaust) : 120 x 120 x 25 mm fan (1000rpm, 16dBA) Power Supply Mounted: Bottom Side Panel Window: Open Frame with Window External 5.25 Drive Bays: 2 Internal 3.5 Drive Bays: Total: (4x) 2.5/3.5 - (3x) hidden drive mounts