Introduction: This is a new design product , which can use the 3.5 inch touchscreen and the cooling fan at the same time. Because the 3.5 inch touchscreen use the GPIO on the for Raspberry Pi board , so we stretch out 2 pin for power supply of cooling from the screen's pcb.3.5 inch Touchscreen320x480 resolutionResistive Contact controlSupports any revision of for Raspberry Pi (directly-pluggable)Compatible with for Raspberry Pi A, B, A+, B+, 2B, 3B, 3B+,4B versionsDrivers providedSize perfectly fits the PiHigh quality immersion gold surface platingSupports Raspbian system, ubuntu system ,kali Linux system (need to configure the driverMetal Holder - There are 2 metal holder to support the cooling fan between the sceeen and for Raspberry Pi board. And there are also cooling heat sink pad between the holder and for Raspberry Pi board's. This design provide good heat dissipation for Raspberry Pi boardRefresh rate: 20 / 60Colour: blackMaterial: plastic + metalPackage Contents:1 x 3.5 inch Touchscreen1 x Stylus1 x Cooling Fan1 x Metal Case for RPI 4BNote : Please use our recommended system for touchscreen. If you use other systems, it may not have Contact function or may not work. You need to configure it yourself. Because there are many systems that the for Raspberry Pi can use, we can't make every system compatible with our touchscreen.Only the above package content, other products are not included.Note: Light shooting 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.