Interface Protection Adapter Board for Raspberry Pi Compute Module 4 Lite/EMMC Series, Provides Physical Protection for Frequent Plugging and Unplugging of CM4 socket Based on Compute Module 4. Onboard Standard CM4 Connectors, Supports access to compute module 4 Lite/EMMC series and connecting to corresponding baseboard/expansion board. (Compute Module 4 Doesn't include) Physical Protection for Frequent Plugging and Unplugging. Prevents damage to the Compute Module 4 socket from frequent physical plugging and unplugging, suitable for applications that require frequent connections of Compute Module 4 Easy to install