The Compute Module 4 IO Board is a companion board for Compute Module 4 (supplied separately).It is designed for 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 systems quickly using off-theshelf parts such as HATs and PCIe cards, which might include NVMe, SATA, networking, or USB.The major user connectors are located along one side to make enclosures simple.Compute Module 4 IO Board also provides an way to prototype systems using the Compute Module 4.Product name: CM4 IO expansion boardSocket: applicable to all versions of Compute Module 4Connector: standard for 40PIN GPIO interface supporting POE function, standard PcleGen2 X1 socket; Various jumpers for disabling functions (e.g. wireless connection, EEPROM writing, etc.)Real time clock: with battery interface and the ability to wake up Compute Module 4Camera: dual MIPI CSI-2 camera interface (22pin 0.5mm FPC connector)USB: 2.0 interface x 2; USB -USB interface (for updating Compute Module4) X1Ethernet support: Gigabit Ethernet RJ45 interface with POE functionSD card slot: onboard -SD card slot (applicable to the version without eMMC)Fan: standard fan interface input: 12V/5VBoundary dimension: 160 x 90mmcolor:GreenMaterial:PCB+MetalPackage Contents:1 x CM4 expansion boardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.