This 9-layer acrylic case is specially engineered for Raspberry Pi 4 Model B, ensuring a snug and secure fit. All cutouts are precisely aligned with USB, HDMI, Ethernet, GPIO, and power ports for easy access and convenient operation. Made from multiple layers of high-quality acrylic, the enclosure offers excellent rigidity and long-lasting protection for your Raspberry Pi board. The stacked, sandwich-style design enhances structural strength while maintaining a compact footprint suitable for desks, labs, and DIY projects. The case comes with a dedicated cooling fan to improve airflow around the CPU and other heat-generating components. When combined with heatsinks (if used), it helps reduce operating temperature, improves stability under load, and extends the lifespan of your Raspberry Pi 4B during continuous or high-performance tasks. The clear acrylic layers create a transparent box shell that showcases the Raspberry Pi board and internal components. This design is ideal for learning, demonstration, and display, allowing users to observe the layout and wiring while keeping everything neatly protected. The 9-layer design is assembled with screws and spacers for quick installation. Each layer is labeled or cut for intuitive stacking, making it easy even for beginners to put . Note: Motherboard not included in shipment. Color: As Shown Material: PCB+Acrylic Package Contents: 1*housing, 1*fan, 1*heat sink, 1*fan guard,1*screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.