https://www.spotpear.com/index.php/index/product/detail/id/1088.html
Overview
This is a CM4 To Pi 4B Adapter for Raspberry Pi and is an alternative solution for Raspberry Pi 4B.
Onboard 4 x USB3.0 port, Gigabit Ethernet port, PoE header, and so on.
Features
Onboard standard CM4 connector, support access to CM4 Lite /
eMMc series boards with Quad Core Cortex A72 64-bit processor, more powerful performance
Easily compatible with the interfaces of Raspberry Pi 4B board
Onboard 4-ch USB 3.0 ports, compatible with USB 2.0 / 1.1 transmission
Onboard RJ45 Gigabit Ethernet port, 10 / 100 / 1000 M adaptive
Onboard PoE header, for connecting PoE HATs
DSI interface is DSI1
USB Type C interface is for the power supply or can be used as
the USB SLAVE interface for programming images
Do not connect to other devices when using the micro USB port
to program the image for ensuring the power supply of CM4
CM4 must be provided by 5V 2A, or it will shut down, lower frequency, etc.
Applicable people
Need a Pi4B with eMMC function while the TF card is not very stable? This adapter is designed for you
If you need 4-ch USB3.0 and dislike the slow USB2.0 interface, you can choose this adapter
Suitable for application scenarios which require wider temperature range