1、The whole body aluminum alloy, the surface is easy to produce a dense and powerful protective film to protect the substrate from corrosion 2、Black case with dual cooling fan metal case for Raspberry Pi 3 B / RPI 3 B/B + type 3、Open shell designed, you don’t need to worry that it will affect the wifi signal again 4、Reinforced aluminum material, light and durable, strong wear resistance, not easy to rust 5、Shell with cooling fan and built‑in heat column can achieve more efficient heat dissipation Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin