1、This CPU cooling fan suits for Raspberry Pi 4B/3B+/3B/3A+, and compatible with all versions of for Raspberry Pi pin definitions. 2、Clear pin definitions by silk screen on the printed circuit board, and comprehensive display of GPIO functions. 3、Pull out all the GPIO pins when the for Raspberry Pi is cooled, it will not affect the development functions of the Raspberry. 4、The double air cooler adopts an active cooling method to discharge heat in time. 5、Both the LED and the fan have independent switches, and it will not bring the feeling of dizziness when used at night. 1 x Cooling Fan for Raspberry Pi4 x Two-Way Standoff(M2.5 x 17mm)8 x Flat Screw(M2.5 x 5mm)1 x Screwdriver1 x Plastic Baseboard2 x For Raspberry Pi Label4 x Printed Circuit Board Spacer Support1 x User Manual  Item Type: Cooling Fan for Raspberry PiProduct Material: Plastic + Printed Circuit BoardApplication: For Raspberry Pi 4B/3B+/3B/3A+Colour: Black