This board has a 1 Gbps Ethernet port and features 2x MIPI-Camera connectors. It also has an M.2 M-key slot capable of using NVMe SSDs or other PCIe peripherals. It has a full size HDMI port, an RTC with battery backup (Version B and C), and a 4-pin fan connector with a fan controller (Version B and C). It also has 2x USB 2.0 ports and a built-in USB 2.0 hub.
CM4 Archives
CM4-IO-BASE-B - Waveshare Wiki
Mini Base Board (A) Designed For Raspberry Pi Compute Module 4
Waveshare Mini Base Board (A) Designed for Raspberry Pi Compute Module 4 Suitable for Evaluating The Raspberry Pi CM4 or Being Integrated Into End
CM4-IO-BASE-C - Waveshare Wiki
Mini Base Board/Mini-Computer Advanced Version, Designed for Raspberry Pi Compute Module 4, CM4-IO-BASE-C
Mini Base Board/Mini-Computer Advanced Version, Designed for Raspberry Pi Compute Module 4, CM4-IO-BASE-C
CM4-IO-BASE-C - Waveshare Wiki
Mini Base Board/Mini-Computer Full Version, Designed for Raspberry Pi Compute Module 4, USB HDMI Adapter Optional
Raspberry Pi Compute Module 4 Development Kit, With Official Io Board, Basic Accessories, And Optional 7 Touchscreen - Demo Board - AliExpress
A Computational Comparative Analysis Between Nvidia Jetson Nano and Raspberry Pi CM4 for the Classification of White Asparagus with SVM
Raspberry Pi – j2i.net