Waveshare Argon One Aluminum Case For Raspberry Pi 4, with Safe Power Button Features 1. Build a shiny mini computer with this decent aluminum case custom made for the Raspberry Pi 4 2. Stylish Aluminum Alloy Housing: Aluminum housing with modern space grey finish, sturdy and beautiful 3. Removable Top and GPIO Recess: The neat GPIO recess and magnetic removable top are both beautiful and protective, and there are even clear pin labels and color-coded headers to make it easier to use 4. "Always on" feature: automatically starts the Pi and runs the fan on power up, enabled via jumper 5. Amazing temperature management: The extended post makes the aluminum case a large heat sink to transfer heat from the board, combined with a cooling fan and multiple vents, the cooling canot be better 6. Neat cable management: All ports are accessed at the back, minimizing cable clutter 7. Safe and convenient power button: Dedicated power button, combined with a one-line script, turns the computer onoff while keeping the stored files safe, and also supports custom functions 8. Easy to assemble, no messy lines: comes with two PCB boards, easy to build, no messy lines, no wrong connections, more stable and safer 9. Proper bottom design: TF card slot on bottom, as well as two vents and four rubber feet