The C5210 19-inch slide-in Industrial PC measures only one height unit. This IPC has a 3?-inch motherboard with on-board RAID controller and two 3?-inch hard drive removable frames. The C5210 can be extended with PCIe modules, a Mini PCI card or a DVD drive. It can be operated with Windows 7 Professional, Windows 7 Ultimate or Windows Embedded Standard 7.