USB Fan Speed Controller with Stepless Control and Noise Reduction, 5V Adjustable Output

USB Fan Speed Controller Why you need this - Precise, simple control of USB-powered fans for tailored cooling. - Allows smooth adjustment of airflow for comfort, noise reduction, and energy saving. - Compact inline controller makes it easy to add variable speed control to common 5.0 V USB fans. Key benefits - Stepless speed adjustment lets you set the exact airflow you want instead of fixed low or high presets. - Inline USB connection works with standard phone chargers, power banks, and computer USB ports for flexible power options. - Built-in on off switch in the control knob for quick power control without unplugging. How it works - Output voltage can be varied between 2.5 V and 8.0 V to control fan speed smoothly. - For typical non adjustable 5.0 V direct drive fans the unit supplies power directly. - For two speed fans with an internal boost board set the fan to a single gear before using the controller, otherwise speed adjustment may not work. - Turn the knob clockwise to increase airflow and counterclockwise to reduce airflow; the knob also acts as an on off switch. Specifications - Power supply range: DC 4 to 12 V. - Output range: DC 2.5 to 8.0 V. - Rated power: 5 W. Do not overload the controller. - Designed for common 5.0 V USB fans available on the market. - Connection: male USB input for plugging into chargers, power banks, or PC USB ports. Micro USB 5.0 V power supplies can also be used. Practical applications - Desk cooling: connect a USB desk fan to the controller and a laptop USB port to reduce noise while keeping comfortable airflow. - Portable cooling: use with a power bank and a USB fan for adjustable airflow on outdoor trips, commuting, or at events. - Electronics cooling: provide gentle, adjustable ventilation for small enclosures or hobby projects that use USB fans. What is included - 1 x USB fan speed controller. Notes and cautions - For a two speed fan, switch the fan to one fixed gear before using the controller to enable speed adjustment. - Do not exceed the rated power of 5 W. - Slight variations in color or minor measurement differences may occur due to monitor and manual measurement variations.