It is the IO board of the for Raspberry Pi Compute Module 5, which can be used with for Raspberry Pi Compute Module 5. It has powerful functions and a mini size, just the size of a bank card. It has 2 USB3.2 Gen1 and 2 USB2.0 onboard, which is convenient for users to use. Onboard 40PINGPIO interface and standard CM5 connector support access to Compute Module 5 Lite /eMMC series core board. Onboard EEPROM and encryption chip provide fast and secure symmetric authentication. Support 4 screens with different displays, add MIPI DSI driver, regardless of whether the screen is connected, the system will default to connection, and the screen will be displayed in split screen (related to the system version). Onboard BOOT, you can press the BOOT button before powering on, connect the computer via Type C, and let the device enter the burning mode. CM5 card holder: for all versions of Compute Module 5 Networking: Gigabit Ethernet RJ45 interface Storage: Onboard Micro-SD card slot (for versions without eMMC) Fan interface: 5V, four-pin JST-SH PWM fan connector Other: Onboard EEPROM and encryption chip Power input: DC 5V 5A The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:Blue Material:PCB Package Contents: 1 * CM5 Base Board 1 * Screw Bag 1 * Screw Post Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.