Compatibility: Compatible with Raspberry Pi 4 Model B 1GB/2GB/4GB/8GB computer only, Model: P173; Case Dimensions: 90 x 65 x 33 mm / 3.54 x 2.56 x 1.30 inch Passive Cooling Design: Don't need extra fan, heavy duty heatsink case with net weight up to 174 grams, with 4 built-in heatsink pillars for better heat dissipation Easy Access to All Ports: Access to all ports of Raspberry Pi 4 Model B, GPIO cable interface and TF Card slot is reservered High Quality Metal Material: Made of high quality aluminum alloy material; Equipped with a copper heatsink to replace the thermal pad at the CPU part, and attach proper silicone grease (not included) on two sides of copper heatsink to get better heat dissipation Note: The Raspberry Pi 4 Model B , Micro SD card or power supply is not included in the packing list