form: ATX MID TOWER CASE chassis option : PA1,PA2;420*183*410 body color : black,silver front panel color: black,silver power supply option: 200W,250W,300W,350W, 400W,450W,500W 5.25 External Bays: 4 3.5 External Bays: 2 3.5 Internal Bays: 5 Front USB 2.0 Port: 2 Front Audio Port: 1 Front Mic Port: 1 fan: 8cm/9cm/12cm back option; air duct: YES Tool-less design: YES