Fuhjythy DC12V 4P PWM Fan Speed Controller with Knob CPU Case Fan Control Switch Noise Reduction and Heat Dissipation B

3. Installation is straightforward: connect the fan to the power supply ensuring correct polarity, and use the potentiometer for speed adjustments. 1. Optimized for 12V 4-wire fans, this PWM fan speed controller ensures precise control over your CPU or chassis fans. Note that it is incompatible with 2-3 wire fans. 4. Designed to handle a fan current up to 3A, this controller is suitable for most standard fans. 2. For reverse-sequence fans, adjust the (PF) setting by short-circuiting it with solder while the power is off to prevent damage. 5. The controller features a minimal power consumption of less than 20mA without a fan. It outputs a 0-5V 25Khz PWM signal, adjustable from 0% to 100% PWM range and 0% to 60% at start.