Waveshare Argon One M.2 Aluminum Case For Raspberry Pi 4, with M.2 Expansion Slot About The Protuct The PI4-CASE-ARGON-ONE-M.2 metal case can greatly speed up the boot and storage speed of the Raspberry Pi, which is to extend the M.2 interface through the USB interface and use an external SSD as the main storage drive. In this case, the Raspberry Pi 4 can be booted through the USB interface, which greatly improves the reading and writing speed and makes the boot speed much faster than using the SD card. Features 1. Aluminum alloy material, modern space grey finish, robust and nice looking 2. Magnetic Design: Magnetic removable top and well designed GPIO header 3. M.2 Expansion Slot: Support M.2 modules like M.2 SSD, which is then connected to the Pi by USB adapter 4. Active + Passive Cooling: The whole case top acts as a Passive cooling for the Raspberry Pi, combined With the Included cooling fan and multiple airflow vents, brings excellent cooling effect 5. Neat Cable Management: All of the ports are accessed at the back, minimal cable clutter 6. Proper Bottom Design: Two airflow vents and four nonskid feet, simple but useful 7. Easy Assembly: Just a few steps to go, no messy wiring, no wrong connection, more stable, more safe