The Chenming 301 is a great looking case with a big side window to add even more customizing options. In the window are two 80mm fan holes to add either intake or exhaust fans to keep the air circulating throughout the case. There are also two other places to add fans: one 80mm mount in the front and one 120mm mount in the back. Also on the front are two USB ports and a FireWire port for easy device connection. This light weight, aluminum case also features four 5.25" bays, 2 external 3.5" bays, and two internal 3.5" bays with 7 rear expansion slots. The dimensions of the Chenming 301 are 8.2"(W) x 17"(H) x 16"(D), and can support Micro ATX or ATX motherboards up to 12" x 9.6". Other features include sliding, external drive assembly and a tool-free internal drive bay for convenient assembly. There is also a tool-free internal drive bay for convenient assembly.