1. Aluminum alloy case , make it more durable to use.2. There are lot of exhaust holes on the top and bottom of case , help for better heat dissipation.3. Support installing the cooling fan on the cover , need not worry about the over heating.4. Add the hanging bracket holes on the case , make it easy to mounting on other devices or position.Introduction:This is the aluminum case for Raspberry Pi 4B. It can fix on the devies by bracket, which fit for more using situation.Compatible with:For Raspberry Pi 4 Model BNOTE:Not included for Raspberry Pi 4B.Color:BlackMaterial:Aluminum AlloyPackage Contents:1 * Aluminum Alloy Case (Self-assembly required)1 * cooling fan1 * Screwdriver(The colors and styles are random, and the designation is not accepted)