Providing a small chassis with high-performance hardware support has always been a persistent pursuit for players. The current market for MICRO ATX chassis is constantly evolving with various segmented specifications to meet the diversity of consumer demands. However, among numerous products, there is a lack of compatibility in different directions and forms, and the details are not perfect. It seems that seeking a chassis that is innovative and meets practical balance is still not an easy task. The development purpose of D32PRO is to provide sufficient selection for the needs of such players. D32PRO has completed the task with a volume of 24L by switching between two motherboard positions A/B mode, and has implemented motherboard back plug support, allowing users to choose and combine different compatibility optimization solutions.