DC12V 4 Pin PWM Fan Speed Controller PWM Speed Controller with Knob D3Q38181
1. The PWM frequency is 25KHZ, which can adapt to most 12V adjustable speed fans on the market.
2. The duty cycle can be adjusted from 0% to 97%, with a wide speed range.
3. The rotary potentiometer has a switch for easy and stop.
4. The rotary potentiometer can adjust the starting speed.
5. Short-circuit the PF pad to reverse the duty cycle

Input voltage: 5-12V
Color: Blue
Material: PCB+Plastic

Package Contents:
2 x Fan Speed Controller