This product is a pc fan controller, made of solid materials, safe and durable. It can last for a long time without being easily . The product is an excellent Computer Case Fan Hub that can bring you more convenience, allowing you to have a more comfortable experience. Features - ColorBlack -Material:PCB, ABS, electronic component - Size: 12.10X6.50X2.00cm/4.76X2.55X0.79in Connector: -A versatile device that allows for easy adjustment of both computer and case fan speeds. -Featuring an infinitely variable speed design, this fan controller allows for precise control over airflow. -With multiple speed control knobs, users can simultaneously adjust the speed of multiple fans. -Installation is a breeze thanks to the interface, which eliminates the need for additional power cables. -This fan hub, is adjustable for quieter operation, ensuring a more peaceful computing experience. Package list: 4 x computer fan adapter