Thermaltake Urban S1 Micro ATX Computer Chassis CA-1A8-00M1NN-00 Case Type: Micro Case Material: SECC External Bay: 2x 5.25", 1x 3.5" Internal Bay: 5x 3.5", 1x 2.5" Expansion Slots: 4 Front I/O Panel: 2x USB 3.0 Ports, 1x HD Audio