1. Can bring 8 fans at the same time, PWM fan speed regulation2.4-wire fans or 3-wire fans with PWM speed control ports can be used in common use. Note that the fan interface sequence is commonly used.3. The maximum power of a single fan is within 60W, and the total power is within 300W (note that the total power also depends on the power of the chassis power supply)4. Multifunctional compatible to control multiple fans5. The product is convenient and easy to operateWorking voltage: DC12VQuiescent current: 0.015A (standby state)PWM duty cycle: 0%-100%PWM frequency: 25khzPrecautions:1. Note that 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, G is the 12V negative pole, do not make mistakes in the wiring sequence, it will damage2. This type of governor requires the fan with its own PWM speed control function. Two-line fans are definitely not good, four-line fans are generally OK, and most of the three-line fans are not. In short, three-line or four-line fans need to have PWM speed control lines. It can be used, if you do not understand, you can contact the fan manufacturer to confirm. You can also test by yourself, short-circuit the yellow wire or blue wire of the fan and the negative (black wire) of the fan. If the fan can stop, it usually has a speed control function, and the corresponding line is the PWM speed control line.Colour:greenMaterial:PCB+Plastic+MetalPackage Contents:5 x Miner Fan Speed ControllerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.