The onboard 40PIN GPIO interface and standard CM4 connector support access to Compute Module 4 Lite/eMMC series motherboardsMore interfaces Equipped with practical interfaces such as ETH / -SD / USB to meet the needs of exclusive applications in developmentThis product is made of high-quality materials, durable, long service life, firm and stable in .Fast startup, loading and file transfer. Low consumption, quiet, reliable and durable.SMALL AND PORTABLE: This product is small and light, does not take up space, and can be easily taken .CM4 Card board : For all versions of Compute Module 4Ethernet: Dual Gigabit Ethernet RJ45 interfaceUSB: USB 2.0 interfaceConnector: 40PIN GPIO interface Onboard: -SD card slot (for versions without eMMC)Fan interface: four-wire SH1.0 interface, adjustable speed, speed measurement, 5V input: 5V, Type-C interfaceDimensions: 55 x 68mmColour:blackMaterial: PCBPackage Contents:1 x 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.