Raspberry Pi 4 passive cooling aluminum case - P173 is designed for Raspberry Pi 4 Model B computer only, support Raspberry Pi 4B 1GB/2GB/4GB/8GB version; Design with good heat dissipation, passive cooling design, net weight up to 184 grams, don't need to install the cooling fan or heatsink, this is a heatsink case. Access to all ports of Raspberry Pi 4 Model B, GPIO cable interface is reservered, support to install the gpio cable. Made of high quality aluminum 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 Reserve the TF slot for easy access. Note: The Raspberry Pi 4 Model B is not included in the packing list. for Raspberry Pi 4 PSU: Recommend to use UL listed 5V 4A Type-C power adapter (ASIN:B09J856PND).