The Thermaltake Urban S31 Mid Tower case is designed to have a simple appearance without cutting out features. The Urban S31 has a brushed aluminum finish on the front door panel, covering the external drive bays while leaving the I/O ports accessible. Front I/O ports include two USB 2.0 ports, two USB 3.0 Ports, and audio in and out jacks. There is also a 2.5”/3.5” HDD docking station on the top of the case, offering an easy way to swap hard drives. Both the 5.25” and 3.5” drive bays feature a tool-free design making the installation easy to accomplish. The Thermaltake Urban S31 has a cooling system made up of two preinstalled 120mm fans and plenty of optional mounting locations for additional cooling.