The case can be used as for case with mini cooling fan and 3.5 inch screen installed. Please note that the ABS case is specially designed for 4 Model B only. The 3.5 inch LCD Contact screen has 480 x 320 resolution, with resistive Contact control; SPI Interface; Power: 5V 0.13A. The LCD Contact screen is suitable for 4B/ 3B/ 3B+ versions. When used for Pi 4B, can support for Raspbian system, for system. When used for 3B/3B+, can support for Raspbian system, for system ,for system. The case has the split design for easy installation, protecting your pi computer and screen, Screen Size: 3.5 Inch LCD Type: TFT LCD Interface: SPI Contact Screen Type: Resistive Contact Screen Controller: XPT2046 Backlight: LED Resolution: 320*480 (Pixel) Power Consumption: 0.13A*5V Operating Temp. (): -20~60 Colour: black Material: ABS Package Contents: 1 x Contact Screen 1 x Stylus 1 x Black ABS Housing 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.