This adapter board for the Compute Module 4 prevents damage to the socket from frequent physical plugging and unplugging, which makes it useful for projects that require frequent connections to the CM4. Note: CM4 is NOT included What's on Board https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2024-09-04 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2024-09-18 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2024-11-29 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2024-11-30 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2025-02-13 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2025-07-31 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2025-11-28 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2025-11-29 https://elecena.pl/product/26879463/protection-adapter-board-for-raspberry-pi-compute-module-4-discontinued 2026-01-12