Raspberry Pi 4 armor case, aluminum alloy metal case specially designed for the Raspberry Pi 4 Computer Model B (1GB/2GB/4GB/8GB) All ports and slots of the aluminum alloy case can match with Raspberry Pi 4 Model B computer perfectly; Add 2pcs 2x20 Female Headers to extend the GPIO pin and insert GPIO cable. Open case design, don't need to worry about affect wifi signal, it is a good raspberry pi 4 heatsink case with good heat dissaption Reinforced aluminum material, lightweight and durable, long-lasting stainless With 3 pieces thermal pads (the thickness is only 0.5mm) to touch the shell body to dissipate heat. You can also use the CPU grease (not included) to get better heat dissipation. Note: If you think the blue Thermal Tape is not good enough for heat dissaption, you can replace it with thin 0.5mm cooper heatsink match with silicone grease (recommend Shin-Etsu Shin-tsu X-23-7921-5) for better heat dissaption.