The Compute Module 4 IO Board is a board for Compute Module 4 (supplied separately). It is designed for use both as a development system for Compute Module 4 and as an embedded board integrated into end products. The IO board is designed to allow you to create quickly using off-theshelf parts such as HATs and PCIe cards, which might include NVMe, SATA, networking, or USB. The major are located along one side to make enclosures simple. Compute Module 4 IO Board also provides an way to prototype using the Compute Module 4. Product name: CM4 IO expansion board Socket: applicable to all versions of Compute Module 4 Connector: standard for 40PIN GPIO interface supporting POE function, standard PcleGen2 X1 socket; Various for disabling specific functions (e.g. wireless connection, EEPROM writing, etc.) Real time clock: with battery interface and the to wake up Compute Module 4 Camera: dual MIPI -2 camera interface (22pin 0.5mm FPC connector) USB: 2.0 interface x 2; USB -USB interface (for updating Compute Module4) X1 Ethernet support: Gigabit Ethernet RJ45 interface with POE function SD card slot: onboard -SD card slot (applicable to the version without eMMC) Fan: standard fan interface Power input: 12V/5V Boundary dimension: 160 x 90mm color:Green Material:PCB+Metal Package Contents: 1 x CM4 expansion board 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.