Features Ultra Thin Design: Sleek and slim aluminum alloy enclosure for a quick and easy installation, ensuring efficient heat dissipation to protect your Raspberry Pi 4 Model B. Double Fan Heat Dissipation: Equipped with a smooth straight aluminum material and double fan design, providing superior heat dissipation performance to keep your Raspberry Pi cool during operation. Open Design for Stable Wireless Transmission: Open design ensures no impact on WIFI signal, enabling more stable wireless transmission for uninterrupted connectivity. Perfect Fit for Raspberry Pi 4 Model B: All ports and slots perfectly aligned for seamless compatibility with Raspberry Pi 4 Model B/B+, offering easy access for all connections and expansions. Reinforced Aluminum Construction: Built with reinforced aluminum, the lightweight and durable enclosure provides reliable protection for your Raspberry Pi, ensuring long-lasting performance. Specification: Item Type:Case Material:Aluminum Alloy Size:Standard Size Color:Black Fitment :Fit for Raspberry Pi 4 Model B / B + Package List: 2 x Black Case 2 x Fan 1 x Wrench 12 x Screw 3 x Glue Paste Package List