Using this 5V cooling fan is a breeze. First, find your Raspberry Pi's 5V + GND GPIO power pins and plug the fan directly into them. This will start the cooling right away. You can put the fan inside the case of your Raspberry Pi or place it on top of the CPU for better airflow. It works with all Raspberry Pi models, but it's especially useful for the Pi 3 when you're doing heavy - duty computing. Remember, your Pi can handle heat on its own by adjusting its speed. So, you don't really need this fan if you're okay with normal operation. But if you want to run your Pi at full speed for a long time, this fan is a great addition. As for maintenance, just make sure to keep it clean. You can use a small brush to gently remove any dust from the fan blades every few months. This will help it keep working well.