Aluminum Case : Red Aluminum Alloy Oxidation Sand Blasting Treatment, Smooth Surface, High Hardness, Pressure Resistance, Metallic Luster, Rust-Resistant, And Good Heat Dissipation. Easy Access To All Ports : Perfectly Matches All Ports And Slots Of Raspberry Pi 4 Model B, Without Affecting Wifi/Bluetooth Signal Transmission. Dual Cooling Fan : Built-In Heat Column, Compatible With Cooling Fan (Fan Not Included), Effective Heat Dissipation. Passive Cooling : Silent Operation Ensures Your Pi Operates Quietly While Maintaining Optimal Performance. High Quality Metal Material : Oxidation Sand Blasting Treatment Enhances Durability And Aesthetics. A professional choice for your Raspberry Pi 4 Model B, designed with precision and elegance. The red aluminum alloy shell features oxidation sand blasting treatment, ensuring durability and style. Experience seamless operation with our passive cooling design, allowing your Pi to run silently without compromising performance. The inclusion of a silicon thermal pad ensures optimal heat dissipation. With easy access to all ports, this case is the perfect companion for your Pi project.