- Material and build: The controller module uses a PC plus metal housing for durability and long lasting use. - Specifications: - Power supply range: 4 to 12V DC - Rated power: 5W (not overload) - Current: up to 5A - Potentiometer with switching function (on/off via the knob) - Stepless output voltage range: 2.5V to 8V for speed control - Suitable for fans when powered from a USB source - How to use: - Connect a USB power source such as a phone charger or a USB power bank to the controller - Plug the fan’s USB connector into the controller’s USB port - Adjust the knob to control airflow: turn clockwise to increase air, turn counterclockwise to reduce - The knob includes a switching function to turn the controller on or off - Package contents: - 3 x Fan DC Controller Modules - Each module provides a stable, stepless speed control from 2.5V to 8V - Compatibility and applicability: - Works with USB powered fans and other small DC fans within 4-12V DC supply - Suitable for DIY projects, cooling solutions, or any setup needing adjustable fan speed without abrupt changes - Use scenarios: - Portable USB fan control: use with a USB charger or power bank to adjust a small fan’s speed on the go - Electronics projects: integrate into DIY cooling enclosures or micro PC builds to obtain smooth, adjustable airflow - Prototyping and testing: fine tune fan speed in experiments or demonstrations that require stable, continuous control within 2.5V to 8V range