Based on for Raspberry Pi CM4 design The board has a standard CM4 connector, which supports access to Compute Module 4 Lite/eMMC series motherboards and corresponding baseboards or expansion boards Physical protection Multiple plug-ins are not a problem Protect the CM4 socket to prevent damage to the CM4 connector caused by multiple physical plug-ins. It is used in environments where multiple plug-ins are required to protect the CM4 core board socket<br><br>Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Blue Material:PCB<br><br>Package Contents: 1*Protection Board<br><br>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.