This product is an IBM PC/AT compatible, box computer designed for industrial use based on a low-power-consumption CPU of the Ultra Low Voltage Intel(R) Celeron(R) M Processor 1.0GHz (FSB400MHz), to operate as a completely nature-cooled (fanless) system. The box computer provides a variety of interfaces including the USB2.0, 100BASE-TX, and RS-232C ports, capable of serving for a wide range of applications as a compact platform based on a general-purpose PC OS. As this series incorporates handpicked components such as the embedded types of CPU and chipset, it excels in environmental resistance and remains in stable supply for an extended period of time. You can therefore use the box computer under severe operating conditions such as FA with ease. Base Model IPC-BX700-AC Model with Expansion Slot IPC-BX700P2-AC (Expansion 2 Slot type) IPC-BX700P4-AC (Expansion 4 Slot type)