Features Practical and Efficient: This DC motor governor is easy to use, small in size, beautiful in appearance and stable in performance. High-quality circuit boards are used to ensure longer service life, and the voltage has a wide operating voltage range of 5V to 24V, which is very convenient and practical. Safe Material: The shell is designed with high-quality insulating material, which is used to protect the controller board from damage and heat dissipation, so that you can use it safely. Strong Adaptability: The DC fan speed controller regulator governor with switch function, high-power speed control switch, stronger adaptability. DC Fan Governor Applicable to: The product is suitable for DC fans with a marked current of less than 1A, and is suitable for brushless motors. High-quality After-sales Service: We provide you with high-quality after-sales service. If you have any questions, please feel free to contact us, and we will deal with it for you as soon as possible. Feature: 1. Used to indicate the DC fan in current 1A, suitable for brushless motor. 2. Potentiometer with switch function, more convenient to use. 3. Easy wiring and installation, saving time and effort. 4. Wide working voltage range from 5v to 24V. 5. Well made with high quality circuit board, long service life. Specification: Item Type: DC Fan Speed Controller Applicable Voltage: 5V-24V Applicable Current: Fan indicates current parameter within 1A Potentiometer Line Length: Approx. 20cm / 7.9in Package List: 1 x Speed Controller Package List 1 x Speed Controller