The device provides a mini aluminum alloy radiator and integrates a silent fan that supports PWM speed regulation. The bottom board provides a wealth of interfaces, supporting dual full-size HDMI interfaces, RJ45 Ethernet interfaces, 2x OTG USB port (dwc2 Overlay needs to be configured to enable it), and one PCIe interface supports M.2 NVME SSD M-KEY 2242 external storage. The DIP switch on the back provides the special pins needed to configure the Raspberry Pi CM4 module. (On Compute Module 4 EMMC-DISABLE / nRPIBOOT (GPIO 40) must be fitted to switch the ROM to usb boot mode.) otherwise, the SPI EEPROM bootloader image will be loaded instead. The 40Pin GPIO lead out and reserved RTC clock battery interface.