Windtunnel Advanced is a very positive and simple model. On the side panel, there are twin large 25cm blue LED fans producing massive air , one targets directly to the Motherboard ,AGP and Memory ram module, the another to the 3.5” & 5.25” bays (Hard drive, CD/DVD Rom & Burner),and the additional 20cm blue LED fan on the top panel draws the discarded heat out of the chassis . Two fans on the side panel directly cool the main heat source of interior of the case, and third fan on the top bring the heat out of the case, and users can observe the interior temperature by thermometer on the front panel and adjust the fans speed. To reach more extremely heat-sink demand, each case has one smart HDD cage includes 10 HDD trays with 10 HDD coolers. There is also a door on the front panel to keep the dust out and give the case a sleek look when closing it. If you need an excellent function with a stylish and a low profile look, XClio Windtunnel Advanced will be your best choice to settle your precious hardware components.