Features: Fully transparent acrylic material, non-toxic and odorless, healthy and environmentally friendly. Comes with a small fan. The housing can be equipped with a small cooling fan to make the heat dissipation more effective. The casing can be opened. The top acrylic plate can be opened upwards for quick and easy use. The entire casing consists of 6 transparent acrylic plates, each with different wiring openings and buckles. The side wiring port provides better ventilation on both left and right side. Specification: Item Type:Acrylic Case Material:Acrylic Color:Transparent Fit for Raspberry Pi 4 Model B Size:9.2 x 6.7 x 3.6cm / 3.62 x 2.64 x 1.42in Package List: 6 x Acrylic Shell 1 x Fan 4 x Screws and Nuts 1、Fully transparent acrylic material, non-toxic and odorless, healthy and environmentally friendly. 2、Comes with a small fan. The housing can be equipped with a small cooling fan to make the heat dissipation more effective. 3、The casing can be opened. The top acrylic plate can be opened upwards for quick and easy use. 4、The entire casing consists of 6 transparent acrylic plates, each with different wiring openings and buckles. 5、The side wiring port provides better ventilation on both left and right side.