- Product Includes : Fan controller module designed for seamless speed adjustment. The output voltage ranges from 2.5V to 8V, allowing for precise fan speed control to enhance comfort levels. - Specifications : Operates within a voltage range of 4V to 12V, with a nominal power rating of 5W (do not overload). The product supports a current of up to 5A. It features a potentiometer with switch functionality, made from durable PC + metal materials for long-lasting use. - Easy to Use : Simply connect the controller to a power source such as a phone or power bank, plug the fan's USB connector into the controller, and turn the adjustment knob to set the desired fan speed. - Versatile Applications : Ideal for regulating the speed of motors, fans, aquarium oxygen systems, and more. This controller provides a reliable solution for various environments where airflow or cooling is needed. Experience optimal control over your devices with this fan controller, designed for both efficiency and durability.