This product is an expansion chassis that adds PCI Express bus slots to a PC. It can add two PCI Express(x1) bus slots by connecting an optional expansion adapter (EAD-CE-LPE, EAD-CE-EC). The board that can be mounted to the long-type [313.8(L) x 111.15(H) mm] PCI Express boards. You can link the ON/OFF control of the chassis to that of your PC. By the compact body design that a cooling fan was built in, space-saving systems construction is possible.