Fan's Function:1. It protects your valuable data by keeping your CPU cool2. The CPU fan features efficient heat dissipation and low noise3. You can work as long as you like without overheating your computer5. Made of high-quality material Made of high-quality material, it is durable in useHow to maintain CPU fan1.Do not put a computer in dusty places2.Regular cleaning of dust and lubricants, every six months or every year.Contact us: If you are not satisfied with our goods, please let us know. we will try our best to help you solve the problem.We will strive to improve ,thank you for your understanding..syi