The Micro Connectors 4-layer acrylic stackable case with fan for Raspberry Pi is made out of solid precision laser cut acrylic. The Open frame design allows for easy access to micro-sd, GPIO, camera csi, and display dsi. With the stackable design, It provides an easy solution for Raspberry Pi clusters. The included active 40mm fan and heat sinks kit cools down the temperature generated from the board and prevents overheating. This versatile case is compatible with Raspberry Pi 1 model B, Pi 2 model B, Pi 3 model B/B, Pi 4 and Pi zero/zero w. This micro connector 4-layer acrylic case is the best choice for your raspberry Pi clusters.