Features: and PWM speed regulation fan controller, the speed regulation frequency is about 25K. PWM is the speed control signal, P is the 12V positive pole, and G is the 12V negative pole. Do not make a mistake in the wiring sequence. Control power: the maximum power of a single fan is within 60W, and the total power is within 300W (note that the total power depends on the power supply of the chassis). It can bring 8 fans at the same time, PWM fan speed control, 4-wire or 3-wire fan with PWM speed control port can be used in common, note that the fan interface sequence is commonly used. It is suitable for the speed regulation of computer case fans and mining machines. Package Includes: 1x Fan Speed Controller Module Specifications: Material: Metal Size: 60x35mm/2.36x1.38inch Pwm Duty Cycle: 0%- Pwm Frequency: 25khz Quiescent Current: 0.015A (Standby State) Working Voltage: Dc12v note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.