The EPC-C300 "ACK-A004E" chassis is a 3.5" SBC chassis that supports front & rear I/O interfaces. It has a fanless system with wall-mount & desk mount support with removable mounting flange. The bottom door for access to devices is on the solder side of motherboard, including Mini-PCIe cards. It features flexible cutouts I/O in the rear bezel up to 5 x DB9 , 3 x dual USB, audio, and circular cutout for LVDS. With easy assembling & maintenance of 2.5" hard disk or SSD.