Mini size of 55 x 62mm, making it compact and easy to integrate into projects. Two full-speed gigabit network ports via PCIe for enhanced performance and lower CPU usage. Retains GPIO pin header for connecting actuators, sensors, and smart cooling fans. USB 2.0 interface for connecting mobile hard drives, printers, WiFi modules, and LTE modules. Powered by BCM2711 4 core 1.5GHz -A72, suitable for high-performance gateways, smart routers, and home IoT platforms, as well as mini-NAS and wireless network bridge applications. Compute Module 4 IoT Router Carrier Board Mini is an internet expansion board based on for Compute Module 4. When connecting with a gigabit network card via PCIe, it brings CM4 two full-speed gigabit network ports and offers better performance, lower CPU usage, and higher stability for a long time work compared with a USB network card. Furthermore, there is also a USB2.0 interface that can be connected to mobile hard drives, printers, WIFI modules, modules, etc. The board-socket of CM4 is fragile, please align the direction and then it down. It is recommended not to repeatedly plug and unplug the CM4 module. Color: Black Material: PCB Package Contents: 1*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.