1,This product is a combination kit, for Raspberry Pi 4B ABS shell and 3.5and 8209 inch display and heat sink and screwdriver, complete parts are easy to use 2,Heat sink is simple and easy to operate, just peel off the adhesive and stick on the for Raspberry Pi. The heat sink fits the size of the for Raspberry Pi chip, tailor‑made for good heat dissipation 3,For Raspberry Pi shell is rich in interfaces, has a variety of interfaces, come with high expansion capabilities, strong and durable, and protects your for Raspberry Pi in all directions 4,For Raspberry Pi shell is professionally designed for production, does not affect the WiFi signal, and the side slot can be installed with GPIO cables 5,3.5inch standard display with 480×320 resolution, strong compatibility, perfectly compatible with all versions of for Raspberry Pi, with resistive touch screen for touch control 6,This 3.5and 8209 inch display is suitable for the motherboard of for Raspberry Pi 4B or 3Band or 3B or 2B. When using it, you need to download the official system of the for Raspberry Pi. Provide a mirror image with driver and a method to debug the official system of the for Raspberry Pi Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.