Control power: 8 fans can be used at the same time, PWM fan speed control, 4-wire fan or 3-wire fan with PWM speed control port can be used in common. Note that the fan interface sequence is commonly used. 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) Quiescent current: 0.015A (standby state) PWM duty cycle: 0%-100% PWM frequency: 25khz NOTE: The batches of raw materials are different, and the colors of the interfaces and capacitors on the product are random(the specified color cannot be selected), which does not affect the use. NOTE: The fan can only be used with PWM speed control function, and there must be a PWM speed control line. NOTE: This model is PWM speed regulation, and 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 any mistakes in the wiring sequence, as mistakes will cause damage. Type: Fan Speed Governor working voltage: DC12V colour:Green Material:PCB+Plastic+Metal size:60 x 35 x 16mm Package Contents: 20 x Miner Fan Speed Controller