Welcome to our store! This dual cooling fan is designed to provide a good experience with its temperature control and low noise level. It is easy to install and ensures rapid heat dissipation, effectively lowering the temperature of your Raspberry Pi motherboard. The chassis features touch buttons that allow you to easily control the fan's on/off function. This cooling fan is specially designed for Raspberry Pi 4B/3B+/3B and comes with LED lights for added visual appeal. Its small size makes it easy to carry and store, offering convenience and excellent performance. In the package, you will receive 1 cooling fan, 4 screw mounting tubes, and 9 screws for assembly. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the item, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.