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- 5V to 12V Voltage Boost: Converts 5V USB power to 12V output to run standard computer case fans. - Inline Speed Control: Built-in dial lets you adjust fan RPM for quiet operation or maximum airflow. - Compatible with 12V PC Case Fans: Works with small 4-pin PWM fan headers commonly used in computer cases. - Durable Build: PVC insulation and copper conductors ensure reliable power delivery and secure connections. - Simple Setup: Plug the USB end into a power bank, PC, or wall adapter and connect the fan; 98 cm cable length adds reach.